I am to believe that his score was 70.
since mike scored 15 less than 85 i had suspected it was 70
a. Use the inclusion/exclusion principle.

b. By definition of conditional probability,

Answer:
Step-by-step explanation:
this is not high school- but uhm
1) KAT
2)TAK
3) SAT
i think thats the answer for the first section..
Answer:
C. 10
Step-by-step explanation:
by deduction, 5 and 7 are prime numbers and 15 is not a multiple of 70, therefore the answer must be 10 as it is a non-prime number and is a factor of 70 (I.e. 10 and 7)