Answer:
a) median= 25 mins
interquartile range= 19mins
b) the braineys
, because the braineys took 32mins on average and the cleverites took 25 mins on average which is 7 minutes more.
Step-by-step explanation:
a) find the median by going across the middle of the cumulative frequency (in this case, 40) until it hits the line (the cleverites) and move down to see the time in minutes. 25 mins.
to find the interquartile range, first find the lower quartile. So find the half of the median, or the quarter of the cumulative frequency ( 20) and go across until it hits the line and look down from that point to find the time ( 15 mins). Then, find the upper quartile by finding 3/4 or half+quarter of the cumulative frequency (60) and do the same with the line (34mins)
the interquartile is upper quartile - lower quartile
34-15= 19 mins
interquartile= 19 mins.
b) the average is the same as the median, so find the median for the cleverites and the median for the braineys, which is 25 mins and 32 mins, therefore the braineys took longer, thus was the slowest at completing the test on average.
16-3y because you distribute through the parenthesis frist and then you solve for your answer
Answer:
21
Step-by-step explanation:
The answer is 21, because we use the combinations formula
7!/(7-2!)(2!) = 6x7/2 = 21
Answer:
Step-by-step explanation:
Now cross multiply,
2m*(p +x) = n
To open the parenthesis, multiply 2m by p and x.
2mp + 2mx = n
Isolate the term with variable 'x'
2mx = n - 2mp
Now, isolate 'x', by dividing both sides by 2m
Let's name the bag of apples "x"
they have 3 bags of apples: 3x
then they need to divide it among 5 people: so each person gets 3/5