Question

For the frequency distribution of marks scored by a student, A = 57, ∑f = 80 and ∑f d = 240. Find the

mean marks.
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Answer 1

Step-by-step explanation:

Answer :

The mean marks scored by a student is 60.

Solution :

d¯=∑fidi∑fi ....... (Formula)

=24080=3 ......(substituting the values) ∴d¯=3

Mean X¯¯¯=A+d¯ ....... (Formula)

=57+3 ...... (Substituting the values)

=60

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Answer 2

Answer:

The mean marks scored by a student is 60.

d= ∑fidi∑fi...... (Formula)

=24080=3......(substituting the values)..d=3

Mean X=A+d....... (Formula)

=57+3...... (Substituting the values)

d=60

Explanation:

The sum of elements that follow a pattern is denoted by the symbol "summation," which also serves as a shorthand notation.

The summation symbol, S, tells us to add up the sequence's components. To the correctness of the total sign is a core feature of the sequence that is being summed.

An index that appears below the summation sign designates the variable of summation.

The outcome of adding two or more numbers or quantities is a summation, often known as a sum. There are typically exactly one 100 terms in a summation. The number of terms can vary between two almost one hundred, thousand, or even one million.

To know more about core, visit:

https://brainly.in/question/1180330

To know more about sequence, visit:

https://brainly.in/question/3296986

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