Qand r are mutually events. if p(q)=0.18 and p(r)=0.18 and p(r)=0.2, find p(q or r). a)0.036 b)0.344 c)0.380

If P(Q or R) = P( Q) + P(R) then,

0.18 + 0.2 = 0.38

So, P(Q or R) = 0.38

C, 0.380

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

a precentage of 6th graders. the population is all 6th graders. let me know if i'm wrong, i hope this ! : )

step-by-step explanation: