A coin is tossed five times. What is the probability that heads are observed more than three times ?

An unbiased coin is tossed until the first head appears or until four tosses are completed, whichever happens earlier. Which of the following statement(s) is/are correct?

1. The probability that no head is observed is $${1 \over {16}}$$.

2. The probability that the experiment ends with three tosses is $${1 \over {8}}$$.

Select the correct answer using the code given below.

If x$$\in$$[0, 5], then what is the probability that x² $$-$$ 3x + 2 $$\ge$$ 0 ?

A bag contains 4 white and 2 black balls and another bag contains 3 white and 5 black balls. If one ball is drawn from each bag, then the probability that one ball is white and one ball is black, is