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3 years ago

Out of 30 students in Mohammed's class, 40% are girls. How many are boys?

Mathematics

1 answer:

romanna [79]3 years ago

3 0

Answer:

18 boys

Step-by-step explanation:

30*0.4= 12

30-12=18

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A 20-person fraternity is making their weekend plans around 5 different parties in IV. Each brother will attend exactly one of t

skad [1K]

Answer:

3876

Step-by-step explanation:

Given the following :

Fraternity members = 20

They are to attend 5 different parties in groups of 4

Meaning a group = 4 persons

Atleast one brother will attend exactly one of the parties. (the brothers are indistinguishable).

Then, exactly one brother at a party (20 - 1) = 19, since they are indistinguishable.

Group members are in 4's

19C4

From: nCr = n! /(n-r)! r!

19C4 = 19! / (19 - 4)! 4!

= 19! / 15! 4!

= (19 * 18 * 17 * 16) / (4 * 3 * 2)

= 93024 / 24

= 3876

3 0

4 years ago

A home pregnancy test was given to women, then pregnancy was verified through blood tests. The following table shows the home pr

prisoha [69]

Please dont tap on the link its a scam

3 0

3 years ago

Suppose James randomly draws a card from a standard deck of 52 cards. He then places it back into the deck and draws a second ca

qwelly [4]

Answer:

1.92%

Step-by-step explanation:

The probability for first case, picking a queen out of deck, will be:

$\frac{4}{52}$

as there will be 4 queens in a deck, one of each suit.

For the second pick, the probability of picking a diamond card, will be:

$\frac{13}{52}$

here the total will remain 52 as he has replaced the first card and not kept it aside and there will be 13 cards in diamond suit (including the three face cards).

Thus the net probability for both cases will be:

$P = \frac{4}{52} * \frac{13}{52}\\ P = \frac{1}{52}\\ P = 0.01923\\P = 1.923\%\\\\P = 1.92\%$

Thus total probability for the combined two cases will be 1.92%

7 0

3 years ago

Luigi's pizzas: Complete the entire table as you answer the question. 4. Luigi uses 36 cups of flour for every 6 pizzas he makes

Alekssandra [29.7K]

Answer:

36/6=6

6 cups per pizza

So for 8 its 48 cups of flour please mark me brainlliest PLEASE

Step-by-step explanation:

4 0

3 years ago

Which equation has a graph parallel to the graph of 9x + 3y = -22 ?<br>

ASHA 777 [7]

Answer:

y=-3x+b

Step-by-step explanation:

To find whether or not an equation is parallel it has to have the same slope. To find this, you start by subtracting 9x from both sides, leaving you with 3y=-9x-22. Then you divide both sides by 3, leaving y=-3x- $\frac{22}{3}$ . With this equation you can see that the slope is -3. The answer will be any equation with -3x.

5 0

3 years ago