a)300 b)600 c)666 d)667]]>

is allowed?

(a) 499 (b) 500 (c) 375 (d) 376 (e) 501]]>

If there were n numbers before, then now there will n-1 numbers left.

Now, if average is 600/17, that means n-1 is multiple of 17.

With Hit & Trial, I come out with n-1=68 as the sum will be 69X70/2=2415.

And as per average, sum of n-1 numbers will be: (600/17)X68=2400.

Therefore, missing number is 2415-2400=15.

]]>1.000 1

+.500 1/2

+.25 1/4

+.1 1/10

--------

1.85

Hence 1+2+4+10=17]]>