a club consist of members whose ages are in A.P. the common difference being 3 months . if the youngest member of the club is just 7 years old and the sum of the ages of all the members is 250 . then the no of members in the club are ;
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The people who have reported/will report this problem, just take a note of one thing, that the Common Difference is given in MONTHS.
First convert it into years(1/4) and then apply the Sum formula as done by Denel Joi
You'll get a quadratic equation, solve it to get N=25