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3 years ago

Giving brainliest !! easy

Mathematics

2 answers:

lora16 [44]3 years ago

4 0

31.4 bc 3.14 x 2 x 5

aliina [53]3 years ago

4 0

Answer:

31.4

Step-by-step explanation:

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Two boys and three girls are auditioning to play the piano for a school production. Two students will be chosen, one as the pian

finlep [7]

Answer:

30% is the correct answer.

Step-by-step explanation:

Total number of boys = 2

Total number of girls = 3

Total number of students = 5

To find:

Probability that the pianist will be a boy and the alternate will be a girl?

Solution:

Here we have to make 2 choices.

1st choice has to be boy (pianist) and 2nd choice has to be girl (alternate).

$\bold{\text{Required probability }= P(\text{boy as pianist first}) \times P(\text{girl as alternate})}$

Formula for probability of an event E is given as:

$P(E) = \dfrac{\text{Number of favorable cases}}{\text {Total number of cases}}$

For $P(\text{boy as pianist})$ , number of favorable cases are 2 (total number of boys).

Total number of cases = Total number of students i.e. 5

So, $P(\text{boy as pianist})$ is:

$P(\text{boy as pianist}) = \dfrac{2}{5}$

For $P(\text{girl as alternate})$ , number of favorable cases are 3 (total number of girls).

Now, one boy is already chosen as pianist so Total number of cases = Total number of students left i.e. (5 - 1) = 4

$P(\text{girl as alternate}) = \dfrac{3}{4}$

So, the required probability is:

$\text{Required probability } = \dfrac{2}{5}\times \dfrac{3}{4} = \dfrac{3}{10} = \bold{30\%}$

6 0

3 years ago

5x : 9 = 8:3<br> Calculate the value of x.

frez [133]

Answer:
4.8

Explanation:
Please see the picture attached!

I hope this helps! Please comment if you have any questions.

7 0

3 years ago

the first 10 games played of the football season how many outcome possibilities are there if the total score of each game is ove

Dmitry_Shevchenko [17]

300 total point
since there r 10 games and 30 points fatal each game then it’s 300

5 0

3 years ago

Find the surface area of each rectangular prism 4 in by 5 in by 12in

8090 [49]

2(20+60+48)=2(128)= 256 square inches

Hope it helps

8 0

3 years ago

HELP!!

taurus [48]

Lets convert

1mile=5280ft
1h=3600s

$\\ \rm\longmapsto 1mph$

$\\ \rm\longmapsto \dfrac{5280}{3600}ft/s$

$\\ \rm\longmapsto 1.46ft/s$

If rounded

$\\ \rm\longmapsto 1.5ft/s$

8 0

3 years ago

Giving brainliest !! *easy*

Giving brainliest !! easy