Boys and girls

There are eight boys and nine girls in the class. There were six children on the trip from this class. What is the probability that left

a) only boys
b) just two boys

Correct answer:

p1 =  0.2262 %
p2 =  28.5068 %

Step-by-step explanation:

C6(17)=(617)=6!(176)!17!=654321171615141312=12376 C6(8)=(68)=6!(86)!8!=2187=28  p1=100 (68+9)(68)=100 (68+9)28=22150%=0.2262%
C4(9)=(49)=4!(94)!9!=43219876=126 C2(8)=(28)=2!(82)!8!=2187=28  p2=100 (68+9)(28) (629)=100 (68+9)28 (629)=2216300%=28.5068%



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










Tips to related online calculators
Would you like to compute count of combinations?
See also our permutations calculator.
See also our variations calculator.

Related math problems and questions: