T=0.25q+87t, equals, 0, point, 25, q, plus, 87
manon's statistics professor puts a bonus question on every test, which adds
0.25
0.250, point, 25 points to a student's overall grade at the end of the term. the above equation gives manon's current overall grade,
t
tt, after taking into account
q
qq extra credit questions answered correctly. what does the
87
8787 mean in this equation?

x> 6

step-by-step explanation:

8x+8> 7x+14

8x-7x> 14-8

x> 6

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560