Mathematics, 25.01.2020 01:31 jamiyacrawford7

In a class there are
8 students who play football and cricket
4 students who do not play football or cricket
14 students who play football
20 students who play cricket
find the probability that a student chosen at random plays football or cricket or both

dont necessarily need an explanation but if you have a simple one i can understand then do tell me x

Answers: 3

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Answer from: Cedars6976

The probability that a student chosen at random plays football or cricket or both is $\frac{13}{15}$ .

We have

Number of students play football and cricket = 8

Number of students do not play football or cricket = 4

Total Number of students play football = 14

Therefore, the number of students who play only football

= 14 - 8

= 6

Total Number of students play cricket = 20

Therefore, the number of students who play only cricket

= 20 - 8

= 12

So, the total number of students

= 8 + 4 + 6 + 12

= 30

Now, the probability that a student chosen at random plays football

$=\frac{6}{30} \\=\frac{1}{5}$

The probability that a student chosen at random plays cricket

$=\frac{12}{30} \\=\frac{2}{5}$

The probability a student chosen at random plays both football and cricket $=\frac{8}{30} \\=\frac{4}{15}$

Therefore, the probability that a student chosen at random plays football or cricket or both

$=\frac{1}{5} +\frac{2}{5}+\frac{4}{15}\\=\frac{3}{15} +\frac{6}{15}+\frac{4}{15}\\=\frac{13}{15}$

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Answer from: cruzc2

the probability that a student chosen at random plays football or cricket or both = $\frac{1}{5} + \frac{2}{5} + \frac{4}{15} = \frac{13}{15}$

Step-by-step explanation:

i) 8 students play football and cricket

ii) 4 students do not play football or cricket

iii) total of 14 students play football.

iv) therefore the number of students who play only football is = 14 - 8 = 6

v) total of 20 students play cricket.

vi) therefore the number of students who play only cricket is = 20 - 8 = 12

vii) therefore the total number of students = 8 + 4 + 6 + 12 = 30

viii) the probability a student chosen at random plays football = $\frac{6}{30} = \frac{1}{5}$

ix) the probability a student chosen at random plays cricket = $\frac{12}{30} = \frac{2}{5}$

x) the probability a student chosen at random plays both football and cricket = $\frac{8}{30} = \frac{4}{15}$

xi) therefore the probability that a student chosen at random plays football or cricket or both = $\frac{1}{5} + \frac{2}{5} + \frac{4}{15} = \frac{13}{15}$

Answer from: Quest

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.

Answer from: Quest

you would have to sell 24 bracelets.

step-by-step explanation:

84/3.5 = 24

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In a class there are
8 students who play football and cricket
4 students who do not play...

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