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3 years ago

I need to learn long division

1 answer:

8 0

The number to be divided into is known as the dividend
The number which division the other number is known as the division

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A supplier delivers an order for 20 electric toothbrushes to a store. By accident, three of the electric toothbrushes are defect

Vladimir79 [104]

The probability that the first two electric toothbrushes sold are defective is 0.016.

The probability of an event, say E occurring is:

$P(E)=\frac{n(E)}{N}$

Here,

n (E) = favorable outcomes

N = total number of outcomes

Let X = the number of defective electric toothbrushes sold.

The number of electric toothbrushes that were delivered to a store is n = 20.

The number of defective electric toothbrushes is x = 3.

The number of ways to select two toothbrushes to sell from the 20 toothbrushes is:

$(\left {{20} \atop {2}} \right. )$ $=\frac{20!}{2!(20-2)!} =\frac{20!}{2!18!} =\frac{20*19*18!}{2!*18!} = 190$

The number of ways to select two defective toothbrushes to sell from the 3 defective toothbrushes is:

$(\left {{3} \atop {2}} \right. )$ $=\frac{3!}{2!(3-2)!} =\frac{3!}{2!1!} =\frac{3*2!}{1!2!} =3$

Compute the probability that the first two electric toothbrushes sold are defective as follows:

P (Selling 2 defective toothbrushes) = Favorable outcomes ÷ Total no. of outcomes

$\frac{3}{190}\\ =0.01579\\=0.016$

Thus, the probability that the first two electric toothbrushes sold are defective is 0.016.

Learn more about probability here brainly.com/question/27474070

#SPJ4

4 0

2 years ago

Brianna has 4 pink bracelets. One third of all her bracelets are pink. How many bracelets does brianna have?

Llana [10]

1 / 3 of her bracelets are pink, and she has 4 pink bracelets, which means she has 8 bracelets in other colors, for a total of 12 bracelets.

5 0

3 years ago

Create a real world problem using probability and post your word problem in the discussion area. If you are having trouble brain

Dovator [93]

I have 16 marbles and 6 friends plus me how many marbles do my friends get If I keep 4 marbles to myself?
OOOOOOOOOOOOOOOO= 16 marbles-4 marbles for me=12 marbles divided by 6 friends= equals 2 marble for each friend.
HOPE IT HELPS :)

7 0

3 years ago

GIVING BRAINLIEST, FIVE STARS, AND THANKS TO CORRECT AND PROPER ANSWER!!!

anygoal [31]

Answer:

$21.64

Step-by-step explanation:

You would multiply 6.38 by 3 to represent each pair of earrings, and then you would just add 2.50. Just show your work by working that out. The appropriate unit of measure would be dollars and cents.

3 0

3 years ago

Read 2 more answers

Could someone answer the question with the photo linked below? Then explain how to solve it?

melomori [17]

Answer:

Hey there!

Pythagorean Theorem:

$a^2+b^2=c^2\\$