In a class there are 10 boys and 8 girls. The teacher wants to select either a boy or a girl to represent the class in a function. The number of ways the teacher can make this selection.

Question

In a class there are 10 boys and 8 girls. The teacher wants to select either a boy or a girl to represent the class in a function. The number of ways the teacher can make this selection. (A) 18 (B) 80 (C) 10P8 (D) 10C8

Tardigrade Admin · Accepted Answer

By fundamental theorem of addition 10 + 8 = 18

Q. In a class there are 10 boys and 8 girls. The teacher wants to select either a boy or a girl to represent the class in a function. The number of ways the teacher can make this selection.

18

80

$^{10} P_{8}$

$^{10} C_{8}$

By fundamental theorem of addition 10 + 8 = 18

Q. In a class there are 10 boys and 8 girls. The teacher wants to select either a boy or a girl to represent the class in a function. The number of ways the teacher can make this selection.

18

80

10P8​

10C8​

By fundamental theorem of addition 10 + 8 = 18

$^{10} P_{8}$

$^{10} C_{8}$