Which unit rate is the lowest price per ounce?

choice a: 30 ounces of chocolate chips for $2.49.

choice b: 40 of chocolate chips for $3.32.

answers:
choice a

choice b

the unit rates are equal

the unit rates can not be determined

the unit rates are equal

Step-by-step explanation:

2.49/30=0.083

3.32/40=0.083

they are equal

you'll just earn points here

step-by-step explanation:

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