From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least 3 men are there on the committee. In how many ways can it be done?

Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of t...

The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is t...

X, Y and Z jointly started a business. It was agreed that X would invest Tk 6,500 for 6 months, Y, Tk 8,400 fo...

Let N be the greatest number that will divide 1305, 4665 and 6905, leaving the same remainder in each case. Th...

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the t...

Albert invested an amount of Tk 8,000 in a fixed deposit scheme for 2 years at compound interest rate 5% per a...