Question

Use the vent diagram to calculate probabilities

Answer 1

P(A) = 3/5 is the only correct answer

There are 15+6 = 21 items in circle A
There are 15+6+10+4 = 35 items total

Dividing the values gets us 21/35 = (7*3)/(7*5) = 3/5

So that's why P(A) = 3/5 is true