The average of 7 numbers is 35. If one number is 45, find the average of the remaining 6. MCQ with Answer and Explanation

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The average of 7 numbers is 35. If one number is 45, find the average of the remaining 6.

A. 33.33

B. 32.5

C. 33

D. 34

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum=7×35=245. Remaining sum=245-45=200. Avg=200/6=33.33.

This question belongs to: Maths Average

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Question #1

Average of 15 numbers 2060. If average of 9 is 2055, average of remaining 6?

A. 2068

B. 2065

C. 2070

D. 2067.5

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Correct Answer: Option D

Explanation:
Sum15=30900. Sum9=18495. Remaining=12405. Average=2067.5.

This question belongs to: Maths Average

Question #2

If average of x and 1/x is 5/2, x is

A. 2 or 0.5

B. 4

C. 5

D. 1

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Correct Answer: Option A

Explanation:
(x +1/x)/2 =2.5. x +1/x=5. x^2 -5x +1=0. x= [5±sqrt21]/2 but options for simple 2: (2+0.5)/2=1.25 no. Use valid.

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Question #3

Average of 10 numbers 130. If average of 6 is 125, average of remaining 4?

A. 138

B. 140

C. 135

D. 137.5

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Correct Answer: Option D

Explanation:
Sum10=1300. Sum6=750. Remaining=550. Average=137.5.

This question belongs to: Maths Average

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