Question

Robin randomly selects a number between 1 and 20. What is the probability that the number selected is the square of a natural number?

a.1/2
b.-3/20
c.-3/10
d.1/5
e.1/3

Answer 1

D is I am pretty sure

Answer 2

Answer: d.
`(1)/(5)`

Explanation:

The square number between 1 and 20 = 1,4,9,16

The number of squares between 1 and 20 = 4

The total numbers between 1 and 20= 20

The probability that the number selected is the square of a natural number is given by :-

`P=\frac{\text{square numbers}}{\text{total numbers}}\\\\\Rightarrow\ P=(4)/(20)=(1)/(5)`

Hence, The probability that the number selected is the square of a natural number is
`(1)/(5)`