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Mathematics — CBSE Class 10 board question

Q1. [1]
Meena calculates that the probability of her winning the first prize in a lottery is 0.08. If total 800 tickets were sold, the number of tickets bought by her, is
  1. (A) $64$
  2. (B) $640$
  3. (C) $100$
  4. (D) $10$
Previously asked in CBSE board exam
2026 30/5/1 Q16
Generated by claude-sonnet-4-6 · 2026-06-15 10:31 · grounding rag
Model Answer

(A) 64

Number of tickets bought by Meena = P(winning) × Total tickets = 0.08 × 800 = 64

Source: Chapter 14, Section 14.1

Explanation

Use the formula: P(E) = (Favourable outcomes)/(Total outcomes). Here, favourable outcomes = tickets bought by Meena, total outcomes = 800. So, tickets = 0.08 × 800 = 64. Don't confuse 0.08 with 0.8 (which gives 640, a common mistake).

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