URGENT PLEASE HELP 15 POINTS
The Computer Club at Highlands Middle School has 6th graders, 7th graders, and 8th graders among its 40 members. The probability model for choosing a club member is given. If a club member is chosen at random, what is the probability that he or she will not be a 7th grader?

Outcome 6th 7th 8th
probability 9/40 14/40 17/40

25/40=13/20

Step-by-step explanation:

just add 9 and 17 which is 26. so it's 26/40. simplify so it's 13/20

the mean and mad

step-by-step explanation:

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl