Question

The children at a birthday party range from 6 to 9 years old.The graph below shows the number of children of each age atthe party. What is the probability that a child selected at randomfrom the children at the party will be 7 years old?

Answer 1

Step 1:

$\text{Probability = }\frac{N\text{umber of required outcomes}}{N\text{umber of possible outcomes}}$

Step 2:

To find the number of possible outcomes, you will add the total number of children from age 6 to 9.

Total number of possible outcomes = 5 + 8 + 4 + 7 = 24

Number of required outcomes (7 years old) = 8

Step 3:

$\begin{gathered} \text{The probability that the child selected is 7 years old = }\frac{8}{24} \\ =\text{ }\frac{1}{3} \end{gathered}$

Final answer

The probability that a child selected at random from the children at the party will be 7 years old

= 1/3