Question

a
box contains a penny, a nickel, a fime, and a quarter. if teo coins
are selected without replacement, the probability of getting an
amount greater than 11 cents is

Answer #1

**P(A) = n(E)/n(S)**

Where P(A) is the probability of an event A

n(E) is the number of favorable outcomes

n(S) is the total number of events in the sample space.

Penny means a cent, a nickel means 5 cents, a fine means 10 cents and a quarter means 25 cents.

Total cases = (4*3)/2 = 6

There will be two cases where the sum of 2 coins won't be greater than 11, which are 1+5 and 1+10. The rest 4 cases will be when the sum is greater than 11.

P = Cases when the sum is greater than 11 / Total cases

P = 4 / 6 = 2 / 3 = **0.67**

**The required probability is 0.67.**

A
jar contains 3 pennies, 7 nickels and 7 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 5 pennies, 8 nickels and 3 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, 2 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. Find the probability X =
10. Find the probability X = 11. Find the expected value of X.

A jar contains 6 pennies, 3 nickels and 6 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. ...........................

Three coins are tossed: a nickel, dime and penny with
probabilities of head known to be 0.4, 0.5 and 0.2, respectively.
What is the probability that of three tails?

A jar contains 2 pennies, 7 nickels and 3 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 P(x=10)
(b) Find P(x=11)
(c) Find the expected value of X

A jar contains 6 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 expected value of X.

a jar contains 3 pennies, 8 nickels and 7 dimes. a
child selects 2 coins at random without replacement from the jar.
let x represents the amount in cent of the selected coins. find the
probability x=10, x=11 find the expected value of x

Suppose a bag contains 2 quarters, 1 dime, 5 nickels, and 3
pennies. If you randomly select one coin out of the bag, what is
the probability that it is a nickel? P(N) = ________ If you
randomly select one coin out of the bag, what is the probability it
is not a quarter? P(Q) = ________ If you select two coins with
replacement, what is the probability of picking a dime (D1) and
then a penny (P2)? Reminder: Show...

A box contains 3 nickels and 4 quarters. two coins are selected
at random from the seven coins at the random variable X is a value
of the two coins. Give the probability distribution for x.

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