An unbiased coin is tossed thrice. The probability of receiving more heads than tails is ........

Two unbiased dice are thrown once. Write all the possible outcomes of this experiment. What is the probability that the sum of numbers on two dice is $4$?

$A$ student attends a $50$ mark test. No negative marks are given in the test. Find the probability that he scores $30$ or $35$ marks.

$A$ lot consists of $48$ mobile phones of which $42$ are good,$3$ have only minor defects,and $3$ have major defects. Varnika will buy a phone if it is good,but the trader will only buy a mobile if it has no major defect. One phone is selected at random from the lot. What is the probability that it is
$(i)$ acceptable to Varnika?
$(ii)$ acceptable to the trader?

In a packet of $500$ screws,$80$ screws are defective. Find the probability that a screw selected at random from the packet is non-defective. (in $/25$)

When a die is thrown,the probability of getting an odd number less than $3$ is