James goes out to eat. the subtotal of his food is $84.52 if he left a $6 tip. what percent of tip did he leave?

7 % of subtotal amount $ 84.52 is left as tip

Solution:

Given that James goes out to eat

The subtotal of his food is $ 84.52

He left a $ 6 tip

To find: percent of tip left

Let "x" be the percent of tip

x percent of $ 84.52 is equal to $ 6

Therefore, we frame a equation as:

Solve the above expression for x

Thus 7 % of subtotal amount $ 84.52 is left as tip

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

the answer is b