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# The Average age of a class of 22 students in 21 years. The average inc

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Math Expert
Joined: 02 Sep 2009
Posts: 58446
The Average age of a class of 22 students in 21 years. The average inc  [#permalink]

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21 Feb 2019, 00:27
00:00

Difficulty:

25% (medium)

Question Stats:

80% (01:06) correct 20% (01:04) wrong based on 10 sessions

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The Average age of a class of 22 students in 21 years. The average increases by 1 when the teacher's age also included. What is the age of the teacher?

A. 44
B. 46
C. 48
D. 49
E. 50

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Location: India
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Re: The Average age of a class of 22 students in 21 years. The average inc  [#permalink]

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21 Feb 2019, 09:52
Bunuel wrote:
The Average age of a class of 22 students in 21 years. The average increases by 1 when the teacher's age also included. What is the age of the teacher?

A. 44
B. 46
C. 48
D. 49
E. 50

total age of students 22* 21= 462
462+x= 22*23
x = 44
IMO A
Re: The Average age of a class of 22 students in 21 years. The average inc   [#permalink] 21 Feb 2019, 09:52
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