Question

from a class of 13 boys and 11 girls , a group of 5 students is selected in such a manner that every group f 5 students is equally likely to be selected . find the probability that there are exactly 3 girls in the selected group ? from a class of 13 boys and 11 girls , a group of 5 students is selected in such a manner that every group f 5 students is equally likely to be selected . find the probability that there are exactly 3 girls in the selected group ? @Mathematics

Answer 1

11 girls out of 24 students, and 5 out of 24 students in the group. 3 girls out of 5 students in the group. I think you would multiply the resulting numbers, but I'm not positive.

Answer 2

i can not understand .................... please explain

Answer 3

11 divided by 24, then 5 divided by 24, then 3 divided by 5. then multiply all the results. I think.

Answer 4

first there has to be exactly 3 girls so 3 is fixed now from 13 boys we want 2 to be SELECTED(this magic word tells us that this is combination)
so this can be done in 13C2 ways
? gives answer