A website Maths Puzzle Numerical Ability

A card is drown from a pack & replaced 260 times.Find the probability of obtaining queen of hearts 4 times.

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A website Other Question

A vessel in the shape of a
hemisphere contains 75ltr of water.How many litr of water contain in another vessel which the radius is 3 times of the 1st vessel?
Complete the following series:
1, 4, 5, 6, 7, 9, 11, __?