SEP-DEC 2020 Mr. Tom invests some amount in deposit A and some amount in deposit B. The total money invested is $2500. He gets
10% income on deposit A and 20% income on deposit B. If the total income earned be $390, find the amount invested in
A and B separately
and B is $
of
The amount invested in deposit A is $
​

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.