If the probability for $A$ to fail in an examination is $0.2$ and that for $B$ is $0.3,$ then the probability that either $A$ or $B$ fails is :
- A$>0.5$
- B$0.5$
- ✓$\leq0.5$
- D$0$
Answer: C.
View full solution →206 questions across 6 question groups — pick any mix to generate a Maths paper with step-by-step answer keys.
MCQ
40 Q→02Solve the following Question.(1 Marks)
44 Q→03Solve the Following Question.(2 Marks)
86 Q→04Solve the Following Question.(3 Marks)
21 Q→05Solve the Following Question.(4 Marks)
10 Q→06Solve the Following Question.(5 Marks)
5 Q→One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Answer: C.
View full solution →Answer: B.
View full solution →Answer: A.
View full solution →Answer: A.
View full solution →Answer: D.
View full solution →| Elementary events: | $W_1$ | $W_2$ | $W_3$ | $W_4$ | $W_5$ | $W_6$ | $W_7$ |
| $0.7$ | $0.6$ | $0.5$ | $0.4$ | $0.3$ | $0.2$ | $0.1$ |
| Elementary events: | $W_1$ | $W_2$ | $W_3$ | $W_4$ | $W_5$ | $W_6$ | $W_7$ |
| $\frac{1}{14}$ | $\frac{2}{14}$ | $\frac{3}{14}$ | $\frac{4}{14}$ | $\frac{5}{14}$ | $\frac{6}{14}$ | $\frac{15}{14}$ |
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