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Ulleksa [173]
3 years ago
15

There are 10 students in a class:7 boys and 3 girls. If the teacher picks a group of 4 at random what is the probability that ev

eryone in the group is a boy
Mathematics
2 answers:
Over [174]3 years ago
6 0

Answer:

Step-by-step explanation:

Probability the first pick is a girl: 7/10

Probability the second pick is a girl: 6/9

Probability the third pick is a girl: 5/8

Probability of picking 3 girls:

7/10 * 6/9 * 5/8 =

= (7 * 6 * 5)/(10 * 9 * 8)

= (7 * 1 * 1)/(2 * 3 * 4)

=7/24

Approximately 0.29 = 29%

astra-53 [7]3 years ago
4 0

Answer:

1/6

Step-by-step explanation:

khan academy

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