The mean of first ten multiples of 5 is
Excel in Class 9th Maths with NCERT solutions and MCQ-based questions from Chapter 12: Statistics. Solve exercise questions, short-answer problems and detailed explanations to grasp the concepts of organizing data, finding central tendencies (mean, median, mode) and representing data graphically. These resources align with the CBSE syllabus, ensuring thorough exam preparation. Regular practice will enhance your understanding of statistical tools and boost your confidence. Use step-by-step solutions and revision notes to simplify learning. Begin now to secure higher scores in exams.
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The first ten multiples of 5 are:
5, 10, 15, 20, 25, 30, 35, 40, 45, 50.
To calculate the mean, use the formula:
Mean = (Sum of all observations) / (Number of observations).
Calculate the sum of the first ten multiples of 5.
Sum = 5 + 10 + 15 + 20 + 25 + 30 + 35 + 40 + 45 + 50.
This is an arithmetic progression (AP) with:
– First term (a) = 5,
– Last term (l) = 50,
– Number of terms (n) = 10.
The sum of an AP is given by:
Sum = n/2 × (a + l).
Substitute the values:
Sum = 10/2 × (5 + 50),
Sum = 5 × 55,
Sum = 275.
Calculate the mean.
Mean = Sum / Number of observations,
Mean = 275 / 10,
Mean = 55.
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