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A container holds 15 quarters and 9 dimes.  Two coins are drawn one at a time.

a.       Find the probability of getting 3 dimes, if the coins are drawn without replacement.

b.      Find the probability of getting 3 quarters, if the coins are drawn with replacement.

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There is a container that holds 9 red marbles, 4 green, and 1 blue marble.  If two selections are made, create a tree diagram to depict this, if the draws are made without replacement.  (make the WHOLE tree with branches, leaves and all of their corresponding probabilities.  Once you get done with the tree, answer these questions.

a)              P(B1 and R2)                                          b) P(R1  G2)

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Given that the Battery Park Battery Company makes, you guessed it, batteries with a yield of 48%.  This means that 48% are good and the rest are defective. (Sounds like the company is defective)

a.       If one battery is selected, find the probability that it is defective.

b.      If two batteries are randomly selected, find the probability that they are both good.

c.       If three batteries are randomly selected, find the probability that at least one is good.

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For which of the following reactions is S° Science Assignment Help

For which of the following reactions is S° > 0.

Choose all that apply.

NH4HS(s)  NH3(g) + H2S(g)

2NH3(g) + 3N2O(g)  4N2(g) + 3H2O(g)

2SO2(g) + O2(g)  2SO3(g)

2H2O(g) + 2Cl2(g)  4HCl(g) + O2(g)

2NO(g) + 2H2(g)  N2(g) + 2H2O(l)

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Predict whether S for each reaction would be greater than zero, less than zero, Science Assignment Help

Predict whether S for each reaction would be greater than zero, less than zero, or too close to zero to decide.

 I2(g) + Cl2(g)2ICl(g)
 COCl2(g)CO(g) +Cl2(g)
 CO2(g) + H2(g)CO(g) + H2O(g)
 2H2S(g) + 3O2(g)2H2O(g) + 2SO2(g)
 2H2O2(l)2H2O(l) +O2(g)
 S > 0
 S < 0
 too close to decide

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Score                     A           B           C        D        F     Total

 0-10 8 11 5 18 41 83 11-20 29 45 80 26 11 191 21-30 50 62 42 20 4 178 31-40 47 62 31 6 10 156 Column Totals 134 180 158 70 66 608

a)  What is the probability that a student will get a “B”?

b)    What is the probability that a student will get an “A” given that a score of 21-30 was achieved on the placement test?

c)   probability that a student scored between 11-20 and got a B in the course?

probability student got b/t 11-20 knowing they got B in clas

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 Find the annual interest rate if a $6000 investment earns$690 annual simple interest in one year.

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 Selena buys several shares of stock at $32 per share and sells them at$28.32 per share. What is the percent of decrease in the price of the stock?

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Amir’s coin collection consisted of 140 stamps in November. In June, his collection grew to 161 stamps. Find the  percent increase between November and June.

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 The cost per minute for a conference phone call, originally \$2.60, increased by 30%. What is the new price?(Points : 1)

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