Question

A ticket is Drawn from a bag containing tickets bearing numbers 1 through 25. find the probability of it's bearing a number which is either even or a multiple of 3​

Answer 1

Step-by-step explanation:

let a be the event of no. being even

p(a) = no. of even no.s / total no. of nos

= 12/25

let b be the event of no. being multiple of 3

p(b) = no. of multiples of 3/ no. of no.s

=8/25

p(a and b) = no. of no.s that are multiple of 6/

total no. of no.s

= 4/25

p(a or b) = p(a)+p(b)- p(a and b)

= 12/25 + 8/25 - 4/25

=12+8-4/25

=16/25