Unit rates: one person walks 9/20 miles in each 3/4 hour. another person walks 8/15 miles in each 2/3 hour. who is faster?

Person 2

Step-by-step explanation:

Person 1 has a rate of .45 in 3/4 hour, and Person 2 has a rate of .53 in 2/3 hour. 2/3 is less than 3/4 and 0.53 is bigger than 0.45.

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

not sure but it may be b, as i said i'm not sure.