Mathematics · 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 the second unit is functioning is p, then 98p is equal to:
- 136
- 232
- 328✓
- 424
Correct answer
28
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