Answer:
0.4 = 40% of this group likes chocolate
Step-by-step explanation:
Conditional Probability
We use the conditional probability formula to solve this question. It is
In which
P(B|A) is the probability of event B happening, given that A happened.
is the probability of both A and B happening.
P(A) is the probability of A happening.
In this questions:
Event A: Likes sprinkles
Event B: Likes chocolate.
20% of your friends like sprinkles (S) topping.
This means that
8% of your friends like Chocolate (C) and also like sprinkles (S).
This means that
Of the friends who like sprinkles, what proportion of this group likes chocolate?
0.4 = 40% of this group likes chocolate