Answer: 100
5
Step-by-step explanation:
a) The mean of a normal distribution is also the median. Half the population will have values above the mean. Half of 200 is 100, so ...
... 100 students will have grades above 70%.
b) 84% is 14% above the mean. Each 7% is 1 standard deviation, so 14% is 2 standard deviations above the mean. The empirical rule tells you 95% of the population is within 2 standard deviations of the mean, so about 5% of students (10 students) got grades higher than 84% or lower than 56%. The normal distribution is symmetrical, so we expect about 5 students in each range.
... about 5 students will have grades above 84%.
So probility is (disired outcomes) divided by (total possible outcomes) so
1st one is white roses
8 white roses so 8 is disired
total=5+3+8=16
8/16=1/2
then without replacing them
red=5
total possible=16-1 since 1 picked
5/15=1/3
then multiply the probatilities
1/2 times 1/3=1/6
it is a 1 in 6 probability
Y=1/2+4
1/2=Slope (M)
4= Y-intercept (B)
So
2/6 of 318=106
so 106-1/2 or 106/2=53
So he has 53 boxes left
Answer
78894-Qm 4443-232
Step-by-step explanation: