Book Maths Puzzle Numerical Ability Probability

in a room there are 7 person,the chance that two of them were born on the same day of the week is.

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Book Other Question

In an examination, it is required to get 36% of maximum marks to pass. A student got 113 marks and was declared failed by 85 marks. The maximum marks are: Find the value of x
if,
A=4
B=14
C=x
D=76