Aclassroom of children has 13 boys and 17 girls in which five students are chosen to do presentations. in how many ways can the five students be chosen so that more boys than girls are selected?

52,338

Explanation:

Since we have to choose such a group of 5 in which number of boys should be greater than the number of girls, therefore each group could have (3 boys, 2 girls) or (4 boys, 1 girl) or (5 boys, 0 girls).

Based on the above discussion the answer shall be:

Number of ways =13C3 x 17C2+13C4 x 17C1+[13C5 x 17C0

                              =38,896+12,155+1,287

                             =52,338

the correct answer is economics is a game without winners or losers.

unlike sports or games economic is a game without losers or winner rather it is a game where everyone wins. parties of business doing businesses exchange money with each other and hence exchange is done on the basis of goods. one party takes the goods and other sales it so there is winner on both sides. each party values more highly the good it gets than the good it gives up. both sides exchange only because both intend to increase their value. so there is no concept of lose or win.