Question

Five students are to be selected from 6 grade 9 students, 10 grade 10 students, 8 grade 11 students, and 9 grade 12 students. In how many ways could they all be from the same grade?

Answer #1

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The students’ council in a school is made up of 9 grade 12
students and 6 grade 11 students. A committee of 5 students is
being randomly selected from the council. What is the probability
that the committee will have 4 grade 11s and 1 grade 12
student?

A committee of four students will be selected from a list that
contains six Grade 9 students and eight Grade 10 students.
a) Show the probability distribution for the number of grade
10's on the committee.
b) What is the expected number of Grade 10 students on the
committee?

A committee of four students will be selected from a list that
contains six Grade 9 students and eight Grade 10 students.
a) Show the probability distribution for the number of grade
10's on the committee.
b) What is the expected number of Grade 10 students on the
committee? (1 mark) Remember, these are humans! No decimals

Of the 15 students (9 boys and 6 girls) in the sixth grade class
at St.Andrew School, five students were absent Thursday.
a.) What is the probability that two of the absent students were
girls?
b.) What is the probability that two of the absent students were
boys?
c.) What is the probability that all the absent students were
boys?
d.) What is the probability that none of the absent students
were boys?

6. The grade point average for 10 randomly selected college
students is: 2.9, 3.1, 3.4, 3.6, 3.1, 4.0, 2.5, 3.7, 3.0, 2.5.(
Assume the sample is taken from a normal distribution)
a) Find the sample mean. (show all work)
b) Find the sample standard deviation.
c) Construct a 99% C. I. for the population mean

If a committee of 6 is being selected from a group of 10 men and
12 women, in how many ways can this committee be arranged if at
least 3 must be women?

There are 11 students in a very small 3rd grade class. In how
many ways can the 11 students be lined up to go out for recess? The
teacher needs to choose two students to serve on the 3rd grade
council. In how many ways can she do that? The teacher needs to
select a hall monitor, a board cleaner, and a lunch hauler for the
class. In how many ways can she assign students to these three
positions?

a.) A committee of five people is to be selected from a group of
11 people. Five of the 11 people are men and the rest are women. If
a committee is randomly selected, find the probability that the
committee has no men.
b.) Given a committee of 5 people, how many ways can we choose
one of these five people to be the chair of the committee and one
of these five people be chosen as the co-chair of...

Randomly selected students were given five seconds to estimate
the value of a product of numbers with the results shown below.
Estimates from students given
1×2×3×4×5×6×7×81×2×3×4×5×6×7×8:
45000, 1000, 500, 1500, 856, 1000, 1252, 200, 1110, 400045000,
1000, 500, 1500, 856, 1000, 1252, 200, 1110, 4000
Estimates from students given
8×7×6×5×4×3×2×18×7×6×5×4×3×2×1:
2000, 2050, 100000, 40320, 300, 10000, 550, 400, 377,
1000002000, 2050, 100000, 40320, 300, 10000, 550, 400, 377,
100000
Use a 0.050.05 significance level to test the claim that the...

60 randomly selected students were asked the number of pairs of
shoes they have. Let X represent the number of pairs of shoes. The
results are as follows:
# of Pairs of Shoes
4
5
6
7
8
9
10
11
12
13
Frequency
3
6
9
6
5
5
6
6
6
8
Round all your answers to 4 decimal places where
possible.
The mean is:
The median is:
The sample standard deviation is:
The first quartile is:
The...

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