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3 years ago

Which events are independent?

1 answer:

4 0

<span>Which events are independent?

I. flipping a coin multiple times
II. picking coins, with replacement
III. picking coins, without replacement

I only

II only

I and II **** this one

II and III</span>

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anygoal [31]

Answer:

0.86

Step-by-step explanation:

3 0

3 years ago

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A box contains 14 nickels, 15 dimes and 6 pennies. if a coin is picked at random from the box, what is the average value of the

Sidana [21]

Answer:

$0.0646 is the expected value of the draw.

Step-by-step explanation:

1 nickel = 5 cents

1 dime = 10 cents

1 penny = 1 cent

Total number of coins = $14+15+6=35$

Probability that a nickel is selected is = 14/35

Probability that a dime is selected is = 15/35

Probability that a penny is selected is = 6/35

So, the expected value of the draw will be =

$\frac{14}{35}*5+\frac{15}{35}*10+\frac{6}{35}*1$

$\frac{70}{35}+\frac{150}{35}+\frac{6}{35}=\frac{226}{35}$

= 6.457 cents ≈6.46 cents

So, in dollars it is = $\frac{6.46}{100}$ = $0.0646

So, $0.0646 is the expected value of the draw.

5 0

3 years ago

At a certain high school, 35 students play only stringed instruments, 10 students play only brass instruments, and 5 students pl

Sophie [7]

Answer:

9/11

Step-by-step explanation:

Well we know there are 55 students in total and only 45 of them can either play a string or brass instrument.

So 45/55 is 9/11

Thus probably is 9/11 of a randomly selected student who plays either a string or brass.

5 0

3 years ago

Each week Charlene uses 3/4 of a bag of cat food to feed her cats. She has 112 bags of cat food in stock. How long will her stoc

inessss [21]

The stock of cat food will last for 149 weeks.

Step-by-step explanation:

Given,

Bags of cat food in stock = 112

Bags used each week = $\frac{3}{4}\ of\ one\ bag$

Let,

x be the number of weeks.

Therefore,

$\frac{3}{4}x=112$

Multiplying both sides by 4/3

$\frac{4}{3}*\frac{3}{4}x=112*\frac{4}{3}\\x=\frac{448}{3}\\x=149.33$

Rounding off to nearest whole number;

x=149

The stock of cat food will last for 149 weeks.

Keywords: fraction, multiplication

Learn more about fractions at:

#LearnwithBrainly

4 0

3 years ago

If there are 5,280 feet in a mile, how many feet are in 2.6 miles?

Katen [24]

The correct answer is 13,728

Hope this helps!

8 0

3 years ago

Read 2 more answers