Questions
Six X's have to be placed in the square of the figure such that each row contains atleast one 'X'. In how many different ways can this be done?
detailed solution
Correct option is C
In all, we have 8 squares in which 6 'X .have to be placed and it can be done in 8C6=28But this includes the possibility that either the top or horizontal row does not have any X. Since, we want each row must have atleast one .x, these two possibilities are to be excluded.Hence, required number of ways = 28 - 2 = 26Similar Questions
The total number of 5-digit numbers of different digits in which the digit in the middle is the largest is
799 666 8865
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