Question

If the given picture represents 5 balloons, then the number of symbols to be drawn to represent 60 balloons is ______ .

A. 5
B. 60
C. 10
D. 12

Answer 1

Hint: In this question a figure is given where in a black symbol 5 white balloons are there. Then we have to find how many symbols will be required to represent 60 balloons. So to find the solution we have to use the unitary method, i.e, first of all we have to find how many symbols are required to represent 1 balloon and after that we can easily find the number of symbols for 60 balloons.

Complete step-by-step answer:
Here it is given 1 symbol represents 5 balloons,
So by unitary method we are going to find the number of supymbols for 60 balloons,
So,
 5 balloons are there in = 1 symbol
$$\therefore$$ 1 balloons are there in = $$\dfrac{1}{5}$$ symbol
$$\therefore$$60 balloons are there in = $$\dfrac{1}{5} \times 60$$ symbols
                                               =$$\dfrac{60}{5}$$ symbols
                                               =$$\dfrac{5\times 12}{5}$$ symbols
                                               = 12 symbols

Therefore we can say that 12 symbols are required to represent 60 balloons.
Hence the correct option is option D.

Note: While solving this type of question you need to know that the unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value. In essence, this method is used to find the value of a unit from the value of a multiple, and hence the value of a multiple.