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vampirchik [111]

3 years ago

11

In a group of 50 students, 12 study geography, 9 study history and 6 of these students both geography and history. What is the p

robability that a student at random from the group, studies neither history nor geography?

1 answer:

xz_007 [3.2K]3 years ago

8 0

Answer:

The probability is 44/50 or 88%

Step-by-step explanation:

So from 50 you subtract 6 which equals 44.

So it is 44/50 = 88%

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<img src="https://tex.z-dn.net/?f=-3%5Csqrt%7B45y%C2%B3%7D" id="TexFormula1" title="-3\sqrt{45y³}" alt="-3\sqrt{45y³}"

GarryVolchara [31]

Answer:

-9A · √(5yA)

Step-by-step explanation:

The coefficient -3 stays the same.

45 factors into 5·9, which is helpful because 9 is a perfect square.

Thus, √45 = 3√5.

y cannot be factored. It stays under the radical.

A³ can be factored into A² (a perfect square) and A.

Thus,

-3√(45yA³) = -3 · 3√5 · √y · A · √A, or

= (-3)(3)(A) · √(5yA), or

= -9A · √(5yA)

4 0

3 years ago

Rasheed bought two kinds of candy bars, chocolate and toffee, that came in packages of 2 bars each. He handed out 2/3 of the cho

Contact [7]

Answer:

9 packages of chocolate bars

Step-by-step explanation:

Let he bought c packages of chocolate bars and t packages of toffee bars,

Since, he bought 1 fewer package of chocolate bars than toffee bars.

⇒ c = t - 1 -----(1)

Also, he handed out out $\frac{2}{3}$ of the chocolate bars and $\frac{3}{5}$ of the toffee bars,

If he handed out the same number of each kind of candy bar.

$\implies \frac{2}{3}\times c=\frac{3}{5}\times t$

$10c = 9t$ ( By cross multiplication )

$\implies t=\frac{10}{9}c$ ( Division property of equality )

From equation (1),

$c=\frac{10}{9}c-1$

$1=\frac{10}{9}c-c$

$1=\frac{10c-9c}{9}$

$1=\frac{c}{9}$

$\implies c = 9$

Hence, he bought 9 packages of chocolate bars.

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2 years ago

an Archer shoots an arrow into the air such that its height at any time T is given by the function H (t) = -16t^2+ Kt + 3 if the

Sunny_sXe [5.5K]

$\begin{gathered} H(t)=-16t^2+kt+3 \\ At\text{ maximum height, final velocity = 0} \end{gathered}$

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1 year ago

what do you call an efficient market theory that asserts that atock prices already incorporate all information (public and priva

bekas [8.4K]

Answer:

efficient market hypothesis

Step-by-step explanation:

4 0

2 years ago

Find the slope given<br> (-3,4)&(3,10)

8090 [49]

Answer:

The slope is 1

Step-by-step explanation:

y2 -y1 /x2 -x1

10-4/ 3- (-3)

6/6

which reduces to 1

8 0

2 years ago