Solve this: Q (vi) The mean of five numbers is 80, out of which mean of 4 numbers is 46, - Maths - Statistics

Question

Solve this:
Q (vi) The mean of five numbers is 80, out of which mean of 4
numbers is 46, find the 5th number:
(A) 4
(B) 20
(C) 434
(D) 66
Ans (D)

Lovina Kansal · Accepted Answer

Dear student
Let the five numbers be a,b,c,d,eMean of five numbers=80⇒a+b+c+d+e5=80⇒a+b+c+d+e=400   
(1)Mean of four numbers=46⇒a+b+c+d4=46⇒a+b+c+d=184Put this value in (1), we get184+e=400⇒e=216So, the 5th number is 216
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Solve this: Q.(vi) The mean of five numbers is 80, out of which mean of 4 numbers is 46, find the 5th number: (A) 4 (B) 20 (C) 434 (D) 66 Ans. (D)

Solve this:
Q.(vi) The mean of five numbers is 80, out of which mean of 4 numbers is 46, find the 5th number:
(A) 4
(B) 20
(C) 434
(D) 66
Ans. (D)