Complementary Event

Q.

If P(A) and P(not A) are complementary events and P(A) = 0.15, then P(not A) = ?

1. 0.3

2. 0.35

3. 0.85

4. Cannot be determined

Q.

The probability of an event occurring is 0.7. The probability of that event not occuring is __. Please give the decimal value.

Q.

There are 500 packets in a large box and each packet contains 4 electric devices in it. On testing, at the time of packing, it was noted that there are some faulty pieces in the packets. The data is as given below :

$\begin{array}{ccccccc}\text{No of faulty devices in a packet}& 0& 1& 2& 3& 4& \text{Total number of packets}\\ \text{Number of packets}& 300& 100& 50& 30& 20& 500\end{array}$

(i) If a buyer will only tolerate the maximum of one faulty piece in a packet, what is the probability that a packet will be rejected by him?

(ii) Another buyer will only take packets with all the pieces functional. What is the probability that a packet will be rejected? [4 MARKS]

Q. Drawing straight parallel lines to axes :
Draw the graph of y = 5.

Q. The probability of drawing a '2' numbered card from a pack of 52 cards is $\frac{3}{13}$.

1. False
2. True

Q.

what is the sum of empirical probability

Q. Change the following statement into passive voice.

1. Did you frighten the noise?
2. Was the noise frightened by you?
3. Were you frightened by the noise?
4. Were you frighten by the noise?

Q.

What is the probability of not picking a face card when you draw a card at random from a pack of 52 cards?

1. $\frac{1}{13}$

2. $\frac{10}{13}$

3. $\frac{12}{13}$

4. $\frac{4}{13}$