What needs to be done first is to add up females and males that have passed.
42 + 14 = 56
so out of 56 students who passed 42 females passed 42/56 = 3/4 = 0.75
out of 56 students who passed, 14 males passed which turns into 14/56 = 1/4 = 0.25
check work; 0.75 + 0.25 = 1.00
NOW WE ARE DOING FAILS.
15 + 5 = 20
so out of 20 students who failed, 15 females failed so it turns into 15/20 = 3/4 = 0.75
out of 20 students who failed, 5 males failed. 5/20 = 1/4 = 0.25
check work; 0.75 + 0.25 = 1.00
i hope this helped! :)
Answer:
its a
Step-by-step explanation:
Let
x--------> Peter's drive speed on the highway in mph
y--------> Peter's drive speed on country roads in mph
we know that
x=25+y-------> equation 1
70/y=120/x------> 70*x=120*y-----> x=120*y/70------> equation 2
remember that
time=distance/speed
equate equation 1 and equation 2
25+y=120*y/70-----> multiply by 70 both sides
70*[25+y]=120*y-----> 1,750+70*y=120*y-----> 50*y=1,750------> y=35 mph
x=25+35------> x=60 mph
the answer is
Peter's drive speed on the highway is 60 mph
Peter's drive speed on country roads is 35 mph
Answer:
about 0.53
Step-by-step explanation:
54% of the insured, or .54×900 = 486 individuals are males. That leaves 900-486 = 414 that are females. 43% of those, or .43×414 = 178 are over 25, so the remainder of the 395 who are over 25 are male.
Since 395 -178 = 217 of the males are over 25, there are 486 -217 = 269 who are under 25. Then the fraction of insureds who are under 25 that are male is ...
269/(900 -395) = 269/505 ≈ 0.53
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It can be useful to make a 2-way table from the given information.