Question

The percentage of marks obtained by a student in mathematics in five monthly unit tests are given below: unit test i ii iii iv v percentage of marks obtained 69 71 73 68 74 find the probability that the student gets more than 70% marks in the next unit test.

Answer 1

$\huge{\mathcal{Hi\: there!}}$

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Some experiments related to PROBABILITY :

$\underline{ \large { \bold{Experiment:}}}$

An operation which can produce some well-defined outcomes, is called an experiment.

Each outcome is called an event.

$\underline{ \large { \bold{Random\:Experiment:}}}$

An experiment in which all possible outcomes are known and the exact outcome cannot be predicted in advance, is called a random experiment.

$\underline{ \large { \bold{Empirical \: Probability :}}}$

Suppose we perform an experiment and let $n$ be the total number of trials. The empirical probability of happening of an event E is defined as

$\mathsf{p(e) = \frac{no \: of \: trials \: in \: which \: event \: happened}{total \: number \: of \: trials}}$

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For the solution of your question, see the above picture attached.

Thanks for the question !

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Answer 2

Ans- (i) p(e1) = 4/5

Therefore, probability = 4/5

ii. P(e2)= 3/5

iii. P(e3)= 2/5

iv. P(e4)= 2/5