Christian randomly selects students from his grade to rate a math test as easy, moderate, or difficult. Of the students he surveyed, 13 said the test was easy, 11 rated it as moderate, and 3 found it difficult. Assuming that all students took the same test, how many of the 162 total students in Christian’s grade would probably rate the test something other than easy?

27

78

84

126
@brooke..help00

Question

Christian randomly selects students from his grade to rate a math test as easy, moderate, or difficult. Of the students he surveyed, 13 said the test was easy, 11 rated it as moderate, and 3 found it difficult. Assuming that all students took the same test, how many of the 162 total students in Christian’s grade would probably rate the test something other than easy?




27



78



84



126
@brooke..help00

brooke..help00 · Answer

I would say a small number because 14/27 kids said it was easy.

brooke..help00 · Answer

I belive 27. Please medal :)

mathmale · Answer

This is "experimental probability:"  probabilities based on actual experimentation.

1.  Find the probability that a student drawn at random would find the test "easy."  Then subtract this from 1, to obtain the prob that a student drawn at random would respond other than "easy"

2.  Mult. that 162 by this probability.

ovidia · Answer

so A? @mathmale