Work Problem on Time and Work
Four boys and four girls can do a piece of work in three days. While two boys and seven girls can do it four days. How long would it take to one boy or one girl to do the work.

Work Problem on Time and Work Nine boys and four girls complete a piece of work in four days. Two boys and four girls complete that work in ten days. How much time does a boy or a girl alone need to complete the work.

Work Problem on Time and Work A and B can do a piece of work in sixteen days. After working four days together A being retire from the work and B finished the work alone in thirty-six days. Find how many days required by each to complete the work.

Work Problem on Time and Work A and B working together can complete a work in eight days. After working for five days together, A has left away and B completed the work in nine days working alone. Find the number of day required by each of them to complete the work alone.

In how many ways can 5 boys and 3 girls stand in a row such that no two girls are together?

In how many, ways can 5 boys and 5 girls be placed in a circle,so( that no two boys are side by side?

Two persons could fit new windows in a house in 3 days. One of the persons fell ill before the work started. How long would the job take now?

There are 7 boys and 3 girls in a class. In how many ways can they be arranged in a row such that no two girls are together?

Why do electrostatics not work well in humid days ?

Formulate the following problems as a pair of equation,and hence find their solutions:(ii) 2 women and 5 men can together finish an embroidery work in 4 days,while 3 women and 6 men can finish it in 3 days.Find the time taken by 1 woman alone to finish the work,and also that taken by 1 man alone.

From 10 boys and 20 girls, a committee of 2 boys and 3 girls is to be formed. In how many ways can this be done if a particular boy is included