Two coins (a one rupee coin and a two rupee coin) are tossed once. Find a sample space.
Clearly the coins are distinguishable in the sense that we can speak of the first coin and the second coin. since either coin can turn up Head $(H)$ or Tail $(T)$, the possible outcomes may be
Heads on both coins $=( H , \,H )= HH$
Head on first coin and Tail on the other $=( H ,\,T )= HT$
Tail on first coin and Head on the other $=(T, \,H)=T H$
Tail on both coins $=(T,\, T)=T T$
Thus, the sample space is $S =\{ HH ,\, HT , \,TH , \,TT \}$
A box contains $10$ good articles and $6$ with defects. One article is chosen at random. What is the probability that it is either good or has a defect
A coin is tossed until a head appears or until the coin has been tossed five times. If a head does not occur on the first two tosses, then the probability that the coin will be tossed $5$ times is
A box contains $2$ black, $4$ white and $3$ red balls. One ball is drawn at random from the box and kept aside. From the remaining balls in the box, another ball is drawn at random and kept aside the first. This process is repeated till all the balls are drawn from the box. The probability that the balls drawn are in the sequence of $2$ black, $4$ white and $3$ red is
A bag contains $30$ balls numbered from $1$ to $30$, one ball is drawn randomly. The probability that number on the ball is multiple of $5$ or $7$ is
Two dice are thrown. The events $A, B$ and $C$ are as follows:
$A:$ getting an even number on the first die.
$B:$ getting an odd number on the first die.
$C:$ getting the sum of the numbers on the dice $\leq 5$
Describe the events $A$ and $B$