Question

Anumber is selected at random from first 50 natural numbers. Then the probability that it is a multiple of 5or 8 is:

Answer 1

Step-by-step explanation:

n(s)=1,2,3,....,50

multiple of 3=3,6,9,....,48

number of multiples of 3=16

number of multiples of 4=12

number of multiples of 3 and 4=4

∴n(A)=16+12−4=28−4=24

P(E)= 24/50 =12/25

Answer 2

Answer:

8/25

Step-by-step explanation:

Multiples of 5 from 1-50: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50

Multiples of 8 from 1-50: 8, 16, 24, 32, 40, 48

There are 10 multiples of 5 in between 1-50, so the chances of getting a multiple of 5 is 1/5.

There are 6 multiples of 8 in between 1-50, so the chances of getting a multiple of 6 is 3/25.

The probability of selecting a multiple of 5 or a multiple of 6 is

1/5 + 3/25 = 8/25