If x is the average of k and 15, and y is the average of k and 5, what is the average of x and y in terms of k?
- k+10/2
- k+7
- k+14
- 10k
Explanation
x = average of k and 15 = (k + 15) / 2
y = average of k and 5 = (k + 5) / 2
Average of x and y = (x + y) / 2
= [ (k + 15)/2 + (k + 5)/2 ] / 2
= [ (k + 15 + k + 5) / 2 ] / 2
= (2k + 20) / 4
= (k + 10) / 2
Related MCQs
- 10 and 30
- 15 and 25
- 20 and 20
- 12 and 28
اس سوال کو وضاحت کے ساتھ پڑھیں
- (t² + 4)(t - 2)(t - 2)
- (t² - 4)(t² - 4)
- (t² + 4)(t + 2)(t - 2)
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- +4
- -4
- +16
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
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