Answer
Verified
394.5k+ views
Hint:
This question contains different types of balls like 10 red, 30 white, 20 blue and 15 orange and all are put in a box. So, if we draw a ball from the box that contains all types of balls, the one coming out may be white, red, blue or orange, but according to the question, we have to find out the probability of occurring of red, white, blue or orange balls. So, we find out the probability of all the individual color balls like red, white, blue and find out the union of red, white and blue ball probability.
Complete step by step solution:
As the no. of different color balls are given: Red (10), White (30), Blue (20) and Orange (15). Now, we have to calculate the probability of each type of colored balls.
Step 1: Since, the number of red balls is 10, no. of white balls is 30, blue balls is 20 and orange balls is 15. So,
\[\begin{align}
& \begin{array}{*{35}{l}}
Total\text{ }no\text{ }of\text{ }sample\text{ }space\text{ }=\text{ }Red\text{ }+\text{ }White\text{ }+\text{ }Blue\text{ }+\text{ }Orange\text{ }balls \\
=10+30+20+15 \\
\end{array} \\
& =75\text{ }balls \\
\end{align}\]
Step 2: Now, we are going to calculate the probability of all these balls which is required to find out. So,
\[The\text{ }probability\text{ }of\text{ }1\text{ }red\text{ }ball\text{ }=\text{ }\dfrac{\left( No\text{ }of\text{ }red\text{ }balls \right)}{\left( Total\text{ }no.\text{ }of\text{ }balls \right)}=\text{ }\dfrac{10}{75}\]
\[\therefore The\text{ }probability\text{ }of\text{ }1\text{ }white\text{ }ball\text{ }=\text{ }\dfrac{30}{75}\]
$\therefore The\text{ }probability\text{ }of\text{ }1\text{ }blue\text{ }ball\text{ }=\text{ }\dfrac{20}{75}$
Step 3: Since, according to the question, the probability of finding out any one ball among the colored balls, so we perform union operation.
⸫ Probability of finding out 1 red, white or blue ball is
$\begin{align}
& =(\dfrac{10}{75}+\dfrac{30}{75}+\dfrac{20}{75}) \\
& =\dfrac{10+30+20}{75} \\
& =\dfrac{60}{75} \\
& =\dfrac{4}{5} \\
\end{align}$
Note:
This question can be solved by a student also from another method, but in this method, a student can understand each and every step directly without much manipulation. Thus, a simple concept of probability is used.
This question contains different types of balls like 10 red, 30 white, 20 blue and 15 orange and all are put in a box. So, if we draw a ball from the box that contains all types of balls, the one coming out may be white, red, blue or orange, but according to the question, we have to find out the probability of occurring of red, white, blue or orange balls. So, we find out the probability of all the individual color balls like red, white, blue and find out the union of red, white and blue ball probability.
Complete step by step solution:
As the no. of different color balls are given: Red (10), White (30), Blue (20) and Orange (15). Now, we have to calculate the probability of each type of colored balls.
Step 1: Since, the number of red balls is 10, no. of white balls is 30, blue balls is 20 and orange balls is 15. So,
\[\begin{align}
& \begin{array}{*{35}{l}}
Total\text{ }no\text{ }of\text{ }sample\text{ }space\text{ }=\text{ }Red\text{ }+\text{ }White\text{ }+\text{ }Blue\text{ }+\text{ }Orange\text{ }balls \\
=10+30+20+15 \\
\end{array} \\
& =75\text{ }balls \\
\end{align}\]
Step 2: Now, we are going to calculate the probability of all these balls which is required to find out. So,
\[The\text{ }probability\text{ }of\text{ }1\text{ }red\text{ }ball\text{ }=\text{ }\dfrac{\left( No\text{ }of\text{ }red\text{ }balls \right)}{\left( Total\text{ }no.\text{ }of\text{ }balls \right)}=\text{ }\dfrac{10}{75}\]
\[\therefore The\text{ }probability\text{ }of\text{ }1\text{ }white\text{ }ball\text{ }=\text{ }\dfrac{30}{75}\]
$\therefore The\text{ }probability\text{ }of\text{ }1\text{ }blue\text{ }ball\text{ }=\text{ }\dfrac{20}{75}$
Step 3: Since, according to the question, the probability of finding out any one ball among the colored balls, so we perform union operation.
⸫ Probability of finding out 1 red, white or blue ball is
$\begin{align}
& =(\dfrac{10}{75}+\dfrac{30}{75}+\dfrac{20}{75}) \\
& =\dfrac{10+30+20}{75} \\
& =\dfrac{60}{75} \\
& =\dfrac{4}{5} \\
\end{align}$
Note:
This question can be solved by a student also from another method, but in this method, a student can understand each and every step directly without much manipulation. Thus, a simple concept of probability is used.
Recently Updated Pages
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
The branch of science which deals with nature and natural class 10 physics CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Define absolute refractive index of a medium
Find out what do the algal bloom and redtides sign class 10 biology CBSE
Prove that the function fleft x right xn is continuous class 12 maths CBSE
Trending doubts
State the differences between manure and fertilize class 8 biology CBSE
Why are xylem and phloem called complex tissues aBoth class 11 biology CBSE
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
What would happen if plasma membrane ruptures or breaks class 11 biology CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
What precautions do you take while observing the nucleus class 11 biology CBSE
What would happen to the life of a cell if there was class 11 biology CBSE
Change the following sentences into negative and interrogative class 10 english CBSE