3 years ago

Hi i am Grace and i realllyyyyyy need help on this. If you could please help that would be great.

1 answer:

7 0

The probability of picking a black ball first is $\dfrac{4}{5}$ , because there are 4 black balls and 1 white ball which is 5 balls in total. After picking the first ball, 4 balls remain - 3 black and 1 white, so the probability of picking a white ball is $\dfrac{1}{4}$ .
So, the probability of picking a black ball first followed by a white ball is $\dfrac{4}{5}\cdot\dfrac{1}{4}=\dfrac{1}{5}$

You might be interested in

Help asap

Nikolay [14]

First, you would create an equation for this problem.
$\frac{18}{15}$ = $\frac{x}{100}$

Next, you would cross multiply.
15x = 1,800

Now, you would isolate the x. To do this, you would divide both sides by 15.
x = 120

It is a 120% increase.

I hope this helps!

7 0

3 years ago

Read 2 more answers

Please help with 5 questions! THANK YOU FOR ANSWERING.

-BARSIC- [3]

1) 6x-7y=-11
2) x=-2
3) y=-4x+1
4) y-5=3(x-1)

8 0

2 years ago

Stu jogs at a rate of 5 mi/h how far must he jog to burn 418.5 calories.9.3 calories per min

boyakko [2]

Answer:

the answer is 45 minutes