The following cards spell out the name Ystradgynlais. YISTIRADIGYNLAIS
In an experiment, the cards are turned face down and rearranged.
A card is selected at random and the letter on the card is recorded.
The experiment is carried out 325 times.
How many times would you expect the letter Y to be recorded?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.