Suppose each box of a popular brand of cereal contains a pen as a prize the pain comes in four colors blue red green and yellow each color of the pin is equally likely to appear in any box of cereal what is the probability of having to buy at least five boxes of cereal to get a blue pen

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?