~|| تجمُّع [ طَــــالــبات ] .:.:. ريــآضيــآت + إحـــصـــآء .:.:. ||~

[L !]

a student and s professor each choose a
number between 1 and 9
( 1 and 9 are both possible choices ) .
what is the probability that two
choose the same odd number ?
0.167
0.062
0.081
0.125

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There are 2 math student and
5 stat astudent in a class .
How many ways can a group
of 3 students be selected
if there must be at least one math student
in this group ?

5
10
20
25