Answer:
0.007218
Step-by-step explanation:
Total number of moderate exercisers = 81
We want to find the probability that they are both moderate exercisers
Probability of first person selected is a moderate exercisers = 81/948
After the selection of the first person who must be moderate exercisers,
Now selecting a different person
Thus, discarding the first person, now 947 subjects are left and 80 moderate exercisers are left.
So, Probability of second person selected is a moderate exercisers = 80/947
∴ Probability of 2 different people selected are moderate exercisers = 81/948 × 80/947
= 540/74813
= 0.007218!
