Three subjects

In a class of 40 students, 18 passed mathematics, 19 passed accounting, 16 passed economics, five mathematics and accounting only, six mathematics only, nine accounting only, and two accounting and economics only. Each student was offered at least one of the subjects.

a) how many students failed in all the subjects?
b) find the percentage number who failed in at least one of economics and mathematics.
c) calculate the probability that a student selected at random failed in accounts

Correct answer:

a =  4
b =  32.5 %
c =  52.5 %

Step-by-step explanation:

n=40 M=17 MO=6 A=19 AO=9 E=16 MA=5 EA=2 MAE=AAOMAEA=19952=3 ME=MMOMAMAE=17653=3 EO=EMEMAEEA=16332=8  OK=MO+EO+AO+MAE+MA+EA+ME=6+8+9+3+5+2+3=36  a=nOK=4036
b2=MO+EO+MA+ME+MAE+EA=6+8+5+3+3+2=27 b=100 nnb2=100 404027=265%=32.5%
c=100 nnA=100 404019=2105%=52.5%



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Would you like to compute the count of combinations?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: