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Question: Answered & Verified by Expert
If two fair dice are rolled then what is the conditional probability that the first dice lands on 6 given that the sum of numbers on the dice is 8 ?
MathematicsProbabilityNDANDA 2019 (Phase 1)
Options:
  • A $\frac{1}{3}$
  • B $\frac{1}{4}$
  • C $\frac{1}{5}$
  • D $\frac{1}{6}$
Solution:
1166 Upvotes Verified Answer
The correct answer is: $\frac{1}{5}$
Total number of cases that sum is 8 are $(2,6),(3,5),(4,4),(5,3),(6,2)$
favourable case $=(6,2)$
$\therefore$ Probability $=\frac{1}{5}$

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