Latest Elitmus 30 aug 2015 Aptitude Question SOLUTION: n is greater then 100 . find the probability. and sum of n nub 101,102,103,104...........n is divisible by (n-100)... (A) 3/4 (B) 1/2 (C) 1/3 (D) 1/100

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Elitmus 30 aug 2015 Question Papers:

(#M40153093) ELITMUS 30 AUG 2015 Numerical Ability question probability Keep an EYE

n is greater then 100 . find the probability. and sum of n nub 101,102,103,104...........n is divisible by (n-100)...

(A) 3/4 (B) 1/2 (C) 1/3 (D) 1/100

Asked In Elitmus 30 aug 2015 Brajmohan Singh Rajpoot (9 years ago)

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Yashwant Singh  (9 years ago)

ans: (B) 1/2
explanation:
start from n=101.. according to q.. sum i.e 101/(101-100) is divisible
now take n=102..according to q.. sum i.e 101+102/(102-100) is not divisible
now take n=103.. according to q.. sum i.e 101+102+103/(103-100) is divisible
now take n=104..according to q.. sum i.e 101+102+103+104/(104-100) is not divisible
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.
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from above u will observe that for half of value of "n" the given sum will be divided by (n-100)..and for rest half it will not be divided.
so. the probability that sum is divisible by (n-100) will be 1/2

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