JEE Mains · Maths · STD 12 - 13. probability
An electric instrument consists of two units. Each unit must function independently for the instrument to operate. The probability that the first unit functions is \(0.9\) and that of the second unit is \(0.8\). The instrument is switched on and it fails to operate. If the probability that only the first unit failed and second unit is functioning is \(\mathrm{p}\), then \(98\, \mathrm{p}\) is equal to ..... .
- A \(14\)
- B \(16\)
- C \(48\)
- D \(28\)
Answer & Solution
Correct Answer
(D) \(28\)
Step-by-step Solution
Detailed explanation
\(\mathrm{I}_{1}=\) first unit is functioning \(\mathrm{I}_{2}=\) second unit is functioning \(\mathrm{P}\left(\mathrm{I}_{1}\right)=0.9, \mathrm{P}\left(\mathrm{I}_{2}\right)=0.8\)…
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