A study concluded that following 7 simple health rules can extend a man's life by 11 years on the average and a woman's life by

Question

A study concluded that following 7 simple health rules can extend a man's life by 11 years on the average and a woman's life by 7 years. These 7 rules are as follows: no smoking, get regular exercise, use alcohol only in moderation, get 7 to 8 hours of sleep, maintain proper weight, eat breakfast, and do not eat between meals. In how many ways can a person adopt 5 of these rules to follow

(a) if the person presently violates 4 of the 7 rules?
(b) if the person never smokes and always gets between 7 and 8 hours of sleep?
(a) There are___ways.

Kunduz · Accepted Answer

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