Ask question

Ask question

All categories

2 years ago

6

Out of a group of 130, 80 people like basketball, 70 like soccer, 50 like both, what is the probablity if you choose randomly th

at you get someone that likes both?

1 answer:

nasty-shy [4]2 years ago

3 0

50 like both out of 130 total
Divide: 50/130 = 5/13

The answer as a fraction is exactly 5/13
The approximate answer is 0.3846

You might be interested in

Say a hacker has a list of n distinct password candidates, only one of which will successfully log her into a secure system. a.

alexdok [17]

Answer:

The probability is $\frac{1}{n}$

Step-by-step explanation:

If she has n distinct password candidates and only one of which will successfully log her into a secure system, the probability that her first first successful login will be on her k-th try is:

If k=1

$P = \frac{1}{n}$

Because, in her first try she has n possibles options and just one give her a successful login.

If k=2

$P=\frac{n-1}{n} *\frac{1}{n-1} =\frac{1}{n}$

Because, in her first try she has n possibles options and n-1 that are not correct, then, she has n-1 possibles options and 1 of that give her a successful login.

If k=3

$P=\frac{n-1}{n} *\frac{n-2}{n-1} *\frac{1}{n-2} = \frac{1}{n}$

Because, in her first try she has n possibles options and n-1 that are not correct, then, she has n-1 possibles options and n-2 that are not correct and after that, she has n-2 possibles options and 1 give her a successful login.

Finally, no matter what is the value of k, the probability that her first successful login will be (exactly) on her k-th try is 1/n

7 0

2 years ago

If ABC is a right triangle, and m∠A=40º, what are possible measures for B and C? (I forgot the screenshot so sowy ;w;*

Lapatulllka [165]

There is many answers to this question but angle B and C have to add up to 140 so angle B and C could both be 70 that should work

6 0

2 years ago

Read 2 more answers

A car uses a litre of petrol to travel 4km. How many litres will it use to travel 32 kilometres.

lesya [120]

Given that,

A car uses a litre of petrol to travel 4 km.

To find,

How many litres will it use to travel 32 kilometres.

Solution,

We have,

1 litre = 4 km

or

1 km = (1/4) litre

Let it will use x litres to travel 32 km.

32 km = (32/4) litres

= 8 litres

Hence, 8 litres it will use to travel 32 km.

3 0

2 years ago

Graph the function and identify the domain and range. y = 0.5x2 A. domain: range: B. domain: range: C. domain: range: D. domain:

vivado [14]

The graph would be a parabola which passes through the origin and opens upwards
The domain is all Real x.

The range is y >= 0

4 0

2 years ago

What is the value of ?

Ede4ka [16]

Remember
$\frac{x^m}{x^n}=x^{m-n}$
and
$x^{-m}=\frac{1}{x^m}$

so
$\frac{3^2}{3^4}=3^{2-4}=3^{-2}=\frac{1}{3^2}=\frac{1}{9}$

5 0

3 years ago