JEE Advanced 2021 Full Test 1 Paper 2

PART – III

Mathematics

SECTION – A (One or More than one correct type)
This section contains 06 multiple choice questions. Each question has FOUR options (A), (B), (C) and (D). ONE OR MORE THAN ONE of these four options is(are) correct.

Question : 42 of 54

Marks: +1, -0

Three are 5 boxes numbered from 1 to 5. There is 1 Red and 2k black balls in kth box, k=1,2,3,4,5. From each box either one red ball is taken or one or more than one black balls are taken. But from each box both coloured balls are never taken (ball of same coloure are all alike). Now which of the following holds good?

Total number of ways selecting odd number of red balls is 4725
Total number of ways of selecting even number of red balls is 5670
Total number of ways selecting odd number of red balls is 5670
Total number of ways of selecting even number of red balls is 4725

Validate

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