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QUESTION
Q
How many 5 digit codes can be constructed using only the digits 0, 1, 2, 3, 4 and 5 and the first digit cannot be 3 and...

Solution

First place can be filled by 1,2,4 and 5 in 4 ways. (3 and 0 cannot be used)Remaining 4 places can be filled by...

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One root of x2 + kx – 8 = 0 is square of the other. Then the value of k is ?

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