Assume that the probability of an athlete exercising less than 4 days per week is 40%. Use the number of days per week of your first subject as a x in the following calculation. Determine the probability of X out of 20 subject exercised less than 4 days per week

Probability = 0.16587

Step-by-step explanation:

Probability of less than = 0.4 = p

Probability of greater than = 1-0.4 = 0.6 = q

Total number of outcome n = 20

Expected outcome x = 7

Probability of 7 out of 20

= 20C7 (0.4) ^7 * (0.6) ^ (20-7)

= 20C7 * (0.4) ^7 * (0.6) ^13

= 77520 * (1.6384*10^-3) * (1.306*10^-3)

= 0.16587