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goldenfox [79]
3 years ago
5

there are 880 student in a school . if 75% of students passed the final exam find the number of passed and failed student​

Mathematics
1 answer:
lukranit [14]3 years ago
5 0
660 students passed while 220 failed the final exam. hope this was helpful. pls give me brainliest
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In the New York State Numbers Lottery, you pay $1 and can bet that the sum of the numbers that come up is 13. The probability of
Harman [31]

Answer:

The expected value of profit is -0.5125. This is expected loss as value is negative.        

Step-by-step explanation:

We are given the following in the question:

P(winning) = 0.075

Thus,

P(Loosing) =

1 - 0.075 = 0.925

If we win we gain a profit of $5.50 and if we loose the lottery, we loose $1.

Thus, we can form the probability distribution in the following manner:

  Event:      Winning       Loosing

Profit(x):      +5.50               -1

     P(x):       0.075             0.925

We have to calculate the expected value of the profit.

E(X) = \displaystyle\sum x_i(P(x_i))\\E(x) = +5.50(0.075) + (-1)(0.925)\\E(x) = -0.5125

Thus, the expected value of profit is -0.5125. This is expected loss as value is negative.

7 0
3 years ago
Activity which odd number comes immedediatly before 87?​
sergejj [24]
85 comes immediately before

6 0
3 years ago
How many meatballs are required for a party of 25 adults and 7 children ?
Dafna11 [192]
I got 114 meat balls
i multiplied 25x4 and 7x2 and added the 2
so 114
3 0
3 years ago
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A projector enlarges an image in the ratio 20:1. What will be the size of an enlargement of a picture that is 8cm by 6cm?
nydimaria [60]

Answer:

160 cm × 120 cm

Step-by-step explanation:

this means 1 cm turns into 20 cm.

so, 8 cm × 6 cm becomes

8×20 = 160 cm × 6×20 = 120 cm

3 0
1 year ago
A car manufacturer produced 5,000 cars for a limited edition model. Dealers sold all of these cars at mean price
Alona [7]

Answer:

<h3>μₓ = 36,000 dollars</h3><h3>σ ₓ= 1,000 dollars</h3><h3 /><h3>Show work:</h3>

to find μₓ = 36,000 dollars:

Look in the question, it states that the mean is $36,000.

to find σ ₓ= 1,000 dollars:

<h3>\frac{3000}{\sqrt{9} } = 1000</h3>
3 0
3 years ago
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