Question

Find the probability that a number selected at random from the numbers 1,2,3,.....40 is a (A)Multiple of 7 (B)A multiple of 3 or 5

Answer 1

Answer:

5/40 ,  21/40

Step-by-step explanation:

(A ) p( x multiple of 7) =  5/40

(B )  p( x multiple of 3) = 13/40

p( x multiple of 5) = 8/40

p( x multiple of 3 or 5) = 13/40 + 8/40  = 21/40