Q. 135.0( 3 Votes )

# A class has 15 st

Answer :

Note Many of the times while solving such simple problems we make a mistake in counting. So at first, we should make a frequency table which tells us no of students in the class of the same age.

This makes our interpretation easier.

∴ frequency distribution table for age and number of students is:

X represents the age of a random student.

∴ X can take values 14,15,16,17,18,19,20 or 21

Total No. of students in class = 15

Using the above frequency table, we can easily see a total number of students of a particular age, and hence we can find probability easily.

P(X = 14) = {As probability = }

Similarly,

P(X = 15) = ; P(X = 16) = ; P(X = 17) =

P(X = 18) = ; P(X = 19) = ; P(X = 20) =

P(X = 21) =

Now we have p_{i} and x_{i.}

∴ Required probability distribution is:-

Rate this question :

An urn contains 3Mathematics - Board Papers

Two cards are draMathematics - Board Papers

There are three cMathematics - Board Papers

Three numbers areMathematics - Board Papers

Let <span lang="EMathematics - Board Papers

Which of the follRD Sharma - Volume 2

Which of the follRD Sharma - Volume 2

A random variableRD Sharma - Volume 2