MBA Exam

find the number of integral solution to |x|+|y|+|z| =10Please post ur approach .

1) 402
2) 304
3) 202
4) 502

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MBA Other Question
A set x contains 8 elements [a, b, c, d, e, f, g, h] 10 subset from x namely x1, x2 ….. x10 are now chosen.Answer Options:-

1) 1
2) 2
3) 3
4) 4
 In an examination there are 'x' questions. Then number of students who answered 'y' or more questions wrongly where 1<=y<=x is given by 2^(x-y). The total number of wrong answers is 8191. Find 'x'

1) 18
2) 12
3) 11
4) 13