Agroup consists of four men and six women. five people are selected to attend a conference.
a. in how many ways can five people be selected from this group of ten?
b. in how many ways can five women be selected from the six women?
c. find the probability that the selected group will consist of all women.

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?