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Statistics
CBSE 2026 Board Exam Set 3 (Code 30/1/3)
CBSE_BOARD_PYQ_2026_30_1_3
Grade 10

Question:

[Section A]

If the mean of the data $3, 4, x, 7, 10$ is $5.4$, then the value of $x$ is:

(a) 3
(b) 5
(c) 4
(d) 6

Step-by-Step Solution

Key Concept: Sum of observations $= \text{Mean} \times N$.
$3 + 4 + x + 7 + 10 = 5.4 \times 5 = 27 \Rightarrow x + 24 = 27 \Rightarrow x = 3$. [1.0 Mark]

Correct Answer: (a) 3
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