Out of 9 boys the number to be taken to form a group, so that the number of different groups maybe greatest is

Find the number of students to be selected at a time from a group of 14 students so that the number of sections is greatest. find the greatest number of selection. Also find the greatest number of selections when there are 15 students.

Find the number of students to be selected at a time from a group of 14 students so that the number of selections is greatest. Find the greatest number of selections. Also find the greatest number of selections when there are 15 students.

The mean of the 5 smallest numbers from a group is 21 while the mean of all the numbers of the group taken togethe is 25. If the mean of the numbers, leaving the smallest five out, is 27.5, how many numbers were there in the group in all?

The mean of the 8 smallest numbers from a group is 17, while the mean of all the numbers of the group taken together is 20. If the mean of the numbers leaving the smallest eight out is 22. how many numbers were present in the group in all?

Choose the number which is different from others in the group

The number of ways in which 10 boys can be divied into 2 groups of 5, such that two tallest boys are in two different groups, is equal to

The number of ways in which 10 boys can be divied into 2 groups of 5, such that two tallest boys are in two different groups, is equal to

Out of 85 children playing badminton or table tennis or both, the toatl number of girls in the group is 70% of the total number of boys in the group. The number of boys playing only badminton is 50% of the number of boys and the total number of boys playing badminton is 60% of the total number of boys. The number of children playing only table tennis is 40% of the total number of children and a total of 12 children play badminton and table tennis both. The number of girls playing only badminton is