In set S there are four numbers. Three of the numbers are 13, 29 and 41, and the fourth number is X. If the mean of the set is less than 25, what could be the value of X?

A 13

B 17

C 19

D 21

Solution

Correct Answer: Option A

এখানে,
{(13+29+41+x)/4} <25
or, {(83+x)/4} <25
or,83+x<100
or, x<100 -83
or, x<17
x এর মান অবশ্যই 17 থেকে ছোট হবে।
তাহলে অপশন অনুযায়ী সঠিক উত্তর 13

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