Question

You are taking a multiple-choice test that has 7 questions. Each of the questions has 5 choices, with one correct choice per question.

a)If you select one of these options per question and leave nothing blank, in how many ways can you answer the questions?

b) in a test of a gender-selection method, 14 babies are born and 10 of them are girls,

i) Find the number of different possible sequences of genders that are possible when 14 babies are box.
ii) How many ways can 10 girls and 4 boys be arranged in a sequence?

Answer 1

a) 78125 b) i) 87178291200 ii) 174182400

Explanation:

a) number of ways in which seven questions can be answered= 5⁷= 78125

b) i) When all fourteen baibes are arranged without gender consideration that is 14 babies are box

14!= 87178291200

ii) When 10 girls and 4 boys are arrnged such that girls are to be together and boys are to be together

2×10! × 4 ! = 174182400