An instructor gives her class a set of 10 problems with the information that the final exam will consist of a random selection of 5 of them. if a student has figured out how to do 7 of the problems, what is the probability that he or she will answer correctly?

0.083

Step-by-step explanation:

Total number of questions 10

with the information that the final exam will consist of a random selection of 5 of them

number of questions the student had figured out= 7

P( All 5 correct)= (5 chosen among 7)/( 5 chosen among 10)

P( all 5 correct)= 7C5÷10C5

= 21÷252= 0.083

2 x^2 -3x+p

sum of roots = 3/2

let other root be x

3+ x = 3/2

x= 3/2 - 3 = -3/2

product of roots = p/2

3× -3/2 = p/2

-9 = p

⭐⭐

answer: 94

step-by-step explanation: 79+91+92+94+94 = 450 divided by 5 (since there are 5 number that are being added) = 90