A large pile of coins consists of pennies, nickels, dimes, and
quarters.
(a)
How many different collections of 40 coins can be chosen if
there are at least 40 of each kind of coin?
(b)
If the pile contains only 20 quarters but at least 40 of each
other kind of coin, how many collections of 40 coins can be
chosen?
(c)
If the pile contains only 30 dimes but at least 40 of each other
kind of coin, how...
You have a jar containing pennies, nickels, dimes, and quarters.
In how many ways can you select exactly 10 coins if the order in
which you select them does not matter and
1. You have at least 10 of each type of coin available and there
are no restrictions
2. You have at least 10 of each type of coin available and you
need to select at least two dimes and two nickels
3. You have at least 10 pennies,...
Consider two populations of coins, one of pennies and one of
quarters. A random sample of 25 pennies was selected, and the mean
age of the sample was 32 years. A random sample of 35 quarters was
taken, and the mean age of the sample was 19 years.
For the sampling distribution of the difference in sample means,
have the conditions for normality been met?
Yes, the conditions for normality have been met because the
distributions of age for the...
A jar contains 5 pennies, 4 nickels and 2 dimes. A child selects
2 coins at random without replacement from the jar. Let X represent
the amount in cents of the selected coins. Find the probability X =
10. Find the probability X = 11. Find the expected value of X.
A jar contains 2 pennies, 6 nickels and 4 dimes. A child selects
2 coins at random without replacement from the jar. Let X represent
the amount in cents of the selected coins.
a. Find the probability X = 11.
b. Find the expected value of X
A jar contains 3 pennies, 7 nickels and 2 dimes. A child selects
2 coins at random without replacement from the jar. Let X represent
the amount in cents of the selected coins.
Find the probability X = 10.
Find the probability X = 11.
Find the expected value of X.
A jar contains 3 pennies, 3 nickels and 5 dimes. A child selects
2 coins at random without replacement from the jar. Let X represent
the amount in cents of the selected coins.
Find the probability X = 10.
Find the probability X = 11.
Find the expected value of X.
Abox containing pennies, nickels, and dimes has 13 coins with a
total value of 83 cents. How many coins of each type are in the
box? Is the economy productive?
Using (gauss elminations)
A jar contains 5 pennies, 3 nickels and 8 dimes. A child selects
2 coins at random without replacement from the jar. Let X represent
the amount in cents of the selected coins. Find the probability X =
10. Find the probability X = 11. Find the expected value of X.
A jar contains 4 pennies, 6 nickels and 2 dimes. A child selects
2 coins at random without replacement from the jar. Let X represent
the amount in cents of the selected coins. Find the probability X =
10. Find the probability X = 11. Find the expected value of X.