Find the number of ways to put 8 bangles in 7 boxes so that each box is filled with 0 or more.
Given that,
Number of bangles, Number of boxes,
Therefore, total number of ways
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50 mL of 0.2 M ammonia solution is treated with 25 mL of 0.2 M HCl. If pKb of ammonia solution is 4.75, the pH of the mixture will be : Option: 1 3.75 Option: 2 4.75
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