Ask Question
7 August, 07:12

There are 777 students in a class: 555 boys and 222 girls. if the teacher picks a group of 444 at random, what is the probability that everyone in the group is a boy?

+2
Answers (1)
  1. 7 August, 07:32
    0
    The probability is 0.1429.

    The probability that the first person chosen is a boy is 5/7. The probability that the second is a boy is 4/6; the third, 3/5; and the fourth, 2/4. Both the numerator and denominator decrease every time, because you lose a boy to choose from and you lose a student to choose from as well. This gives us:

    5/7 (4/6) (3/5) (2/4) = 120/840 = 0.1429.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “There are 777 students in a class: 555 boys and 222 girls. if the teacher picks a group of 444 at random, what is the probability that ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers