It is known that 20% of all students in some large university are overweight, 20% exercise regularly and 2% are overweight and exercise regularly. what is the probability that a randomly selected student is either overweight or exercises regularly or both?

0.38

Step-by-step explanation:

Let total Students be x

then 20% is overweight(A)

20 % exercise regularly(B)

2 % are overweight and exercise regularly

Probability that  a randomly selected is either overweight or exercises regularly or both

i.e.

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24