MATH

Lets remind our mathematic knowlege for EGE

exercise 1

its the triangle with stupid ∠ C

AB=R

we should find ∠ C

desision

1. 
2. stupid ∠ C => ∠ C= 150

answer

150

exercise 2

its the right six-corner pyramid

V(sabc)=33

we should find V(SABCDEF)

desision

1. 33*6=198

answer 198

exercise 3

16 teams take part on the World Championship

it should be separated to 4 group randomly

1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4.

what is the probability what Russia in the second group?

desision

answer 0,25

exercise 4

what is the probability what first one random phone number