Average of a,b,c,d is 25. If a=20, b=30, c=25, d=? MCQ with Answer and Explanation

Average of a,b,c,d is 25. If a=20, b=30, c=25, d=?
A. 22
B. 30
C. 25
D. 20
Answer: Option C
Solution (By JKSSB Mock Tests)
d=100-75=25.

This question belongs to: Maths Average
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Question #1
Average of 12 numbers 1320. If average of 8 is 1315, average of remaining 4?
A. 1325
B. 1330
C. 1332
D. 1328

Correct Answer: Option B


Explanation:
Sum12=15840. Sum8=10520. Remaining=5320. Average=1330.

This question belongs to: Maths Average
Question #2
The average of 7 consecutive integers starting from n is 25. What is n?
A. 21
B. 24
C. 23
D. 22

Correct Answer: Option D


Explanation:
Average = n+3 =25. n=22.

This question belongs to: Maths Average
Question #3
Average of 1 to 100 except 50 is
A. 51
B. 49.5
C. 50.5
D. 50

Correct Answer: Option C


Explanation:
Sum1-100=5050. Minus 50=5000. /99≈50.505.

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