my college hive icon mycollegehive
Groups
My College Hive notifiction icon Questions
Connect / Friends
Tags
Quiz
Books
There are 8 boys and 4 girls in a lift, What is the probabil...
waec-2019 ssce-exam-2019 waec-mathematics-2019 math
up
0
down

There are 8 boys and 4 girls in a lift, What is the probability that the first person who steps out of the lift will be a boy

A. 3/4

B. 1/3

C. 2/3

D. 1/4

467 views
Share Follow
peter
Asked by peterrep:1.7K
University of Lagos Nigeria
02 May 2020

Comments

dp
james_mark
2/3
1 likes, 0 dislikes




1 answer(s)

Advertisement (continue below)

judziy
Judziy answeredrep:1.9K
University of Benin Nigeria
14 August 2020
up
0
down

probability of that the first person who steps out will be a boy, Pr(B) = number of boys in the lift/total number people in the lift

number of boys = 8

Total number = number of boys + number of girls

Total number = 8 + 4 = 12

Therefore,

Pr(B) = 8/12

= 2/3

Ans C

Share
Comments
dp
peter, University of Lagos
Thanks
0 likes, 0 dislikes




Advertisement (continue below)


Groups

Advertisement (continue below)

Your Answer

How to insert math formulas/equations

my college hive loader icon



Related Tags

waec-2019

6 followers

64 questions

ssce-exam-2019

3 followers

64 questions

waec-mathematics-2019

4 followers

53 questions

math

15 followers

1261 questions