If Tashi scores an 85, 87, and 89 on his first three tests, what must he score on his fourth test so that the average of the four test scores is exactly 90? AO 97 B 100 87 DO 99
If Tashi scores an 85, 87, and 89 on his first three tests, what must he score on his fourth test so that the average of the four test scores is exactly 90? AO 97 B 100 87 DO 99
Chapter9: Sequences, Probability And Counting Theory
Section9.5: Counting Principles
Problem 42SE: In horse racing, a “trifecta” occurs when a bettor wins by selecting the first three finishers in...
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![If Tashi scores an 85, 87, and 89 on his first three tests, what must he score on his fourth test so that the average of the four test scores is
exactly 90?
AO
97
B
100
87
DO
99](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6fab49b1-ecfc-44a8-9a4e-deec71880c8c%2F4bb2b5d8-d2df-4707-932a-2c4f844fdd94%2Fsljt7up_processed.png&w=3840&q=75)
Transcribed Image Text:If Tashi scores an 85, 87, and 89 on his first three tests, what must he score on his fourth test so that the average of the four test scores is
exactly 90?
AO
97
B
100
87
DO
99
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