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> 6th grade , Ratios,
& percentages , Intro
tes
The following table shows the speeds at which Jeff does 4 activities. For example, biking has a rate of 19
miles in 2 hours
Activity
Miles
Hours
19
2
Intro to rates
Biking
Walking
14
4
Solving unit rate problem
Running
15
3
Swimming
18
4
Solving unit price problem
Which type of activity does Jeff do at a speed of 4.5 miles per hour?
Practice: Unitrates
Choose 1
Rate problems
Biking
Practice: Rate problems
* Walking
> Comparing rates example
© Running
→ Practice: Comparing rates
Rate review
0 Swimming

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

m∠a is 90°

m∠b is 40°