1003019103 | math4u.vsb.cz

SubArea:

Level:

Project ID:

1003019103

Source Problem:

Accepted:

1

Clonable:

1

Easy:

0

There are

30

students in the class, one of them is Adam. The teacher picks randomly three students to be tested. What is the probability that Adam is among them?

\frac{(\binom{29}{2})}{(\binom{30}{3})} = 0.1

\frac{(\binom{29}{2})}{(\binom{30}{2})} ≐ 0.9333

\frac{(\binom{29}{3})}{(\binom{30}{3})} = 0.9

\frac{(\binom{3}{1}) (\binom{27}{2})}{(\binom{30}{3})} ≐ 0.2594