A new car scanner has a 80% probability of correctly identifying a mechanical repair based on results of a customer questionnaire. Suppose that 20 random questionnaires are provided to the car scanner. Required:
a. What is the probability that exactly 8 repairs are correctly identified? Show how you calculate this value, e. g. calculator function or formula.
b. What is the probability of at most 8 repairs correctly identified?

sorry, i don't know i just need points, i'm new here. chao

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

9

step-by-step explanation:

answer: 1 + 1 = 11

step-by-step explanation: