Question

#5 - Each of the whole numbers 1 to 20 is written separately on 20 ping-pong balls andplaced in a hat. Find the probability that you draw a number that is evenly divisible by 5.Type in the correct percentage to the nearest whole number. Do not include the percentagesign.

Answer 1

Given:

The numbers written on ping-pong balls are 1 to 20, N = 20.

The objective is to find the probability of drawing a number that is evenly distributed by 5.

The numbers divisible by 5 in 1 to 20 is, 5, 10, 15 and 20.

`n(E)=4`

Then, the required probability can be calculated as,

`\begin{gathered} P(E)=(n(E))/(N) \\ =(4)/(20) \\ =0.8 \\ =80\text{ percentage.} \end{gathered}`

Hence, the probability of drawing a number that is evenly distributed by 5 is 20 percentage.