AIEEE Exam

n the expansion of ( 4 9 +6 8 )
500 the number of
terms which are integral is -
(A) 250 (B) 43
(C) 251 (D) 44

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AIEEE Other Question

2m white counters and 2n red counters are
arranged in a straight line with (m + n) counters
on each side of a central mark. The number of
ways of arranging the counters, so that the
arrangements are symmetrical with respect to the
central mark, is A student is allowed to select at most n books
from a collection of (2n + 1) books. If the total
number of ways in which he can select at least
one book is 63, then the value of n is -
(A) 2 (B) 3 (C) 4 (D) 5