Two bones are thrown. To find probability that the total number of pips on the happen to be facets is even, and on a facet even by one of bones will appear six pips. In the container there are 10...

Two bones are thrown. To find probability that the total number of pips on the happen to be facets is even, and on a facet even by one of bones will appear six pips.

In the container there are 10 identical devices marked with the numbers 1, 2, . . . , 10. The six devices are taken arbitrary. To find probability that among the extracted devices will appear: a) the device with the number 1; b) devices with the numbers 1 and 2.

In a batch from N geophones n geophones are standard ones. The m receivers is selected randomly. To find probability that among select receivers k receivers are standard ones.