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2 years ago

11

In a class of 22 students, 13 have a brother and 15 have a sister. There are 3 students who do not have any siblings. What is th

e probability that a student has a brother given that they do not have a sister?

1 answer:

Aneli [31]2 years ago

7 0

Answer:

1/4

Step-by-step explanation:

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The value of Adam's model railway is $550.

garik1379 [7]

Answer:(c)

Step-by-step explanation:

Given

The initial value of Adam's model is $A_o=\$550$

the value increases exponentially with the rate of $r\%$

Time period $t=5\ years$

Final amount $A=\$736$

Exponential growth is given by

$\Rightarrow A=A_o(1+r)^t$

Putting values

$\Rightarrow 736=550(1+r)^5\\\\\Rightarrow (1+r)^5=1.338$

$\Rightarrow 1+r=1.05999\\\Rightarrow r=0.05999\ or\ 5.99\%\approx 6\%$

Option (c) is correct

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2 years ago

How do u solve proportion equations

jok3333 [9.3K]

You draw a line and then a = and another line on another side

like this but bigger ––=––

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2 years ago

If you buy 3 tickets for 50 cents each and have $.40 left over , how many do u have before purchasing?

Pachacha [2.7K]

Answer:

Step-by-step explanation:

($0.50 * 3) + $0.40= $1.90

5 0

3 years ago

Read 2 more answers

The surface area of a ball is 3,600 square millimeters. What is the balls radius

allsm [11]

$A = 4 \pi r^2$

$3600 = 4\pi r^2$

$\dfrac{3600}{4 \pi} = r^2$

$r^2 = 286.479$

$r = 16.9$

Answer: The radius is 16.9 mm.

4 0

3 years ago

I don’t know how to do it

lara [203]

Multiply the speed of the train by how many hours it travels:

22.5 miles per hour x 2.5 hours = 56.25 mile.

The train is 60 miles from it's destination, so now you want to subtract the miles it will travel in 2.5 hours from the total distance:

60 miles - 56.25 miles = 3.75 miles away from its destination.

5 0

2 years ago