Out of the past 250 consecutive days, its weather forecasts were correct 175 times.
(i) What is the probability that on a given day it was correct?
(ii) What is the probability that it was not correct on a given day?

A bag contains 5 red balls, 8 white balls, 4 green balls and 7 black balls. If one ball is drawn at random, find the probability that it is
(i) black
(ii) not green.

A die is rolled 25 times and outcomes are recorded as under:

It is thrown one more time. Find the probability of getting
(a) an even number
(b) a multiple of 3
(c) a prime number.

The percentages of marks obtained by a student in examination are given below:

Find the probability that the student gets
(i) a first class i.e. at least 60% marks
(ii) a distinction i.e. 75% or above
(iii) marks between 70% and 80%

An insurance company selected 1600 drivers at random in a particular city to find a relationship between age and number of accidents. The data obtained are given in the following table:

Find the number of drivers
(a) in the age of 25-40 years and has more than 2 accidents in the year.
(b) in the age above 40 years and has accidents more than 1 but less than 3.

The king, queen, and jack of clubs are removed from a deck of 52 cards and then shuffled. One card is selected from the remaining cards. What is the probability of getting
(a) a heart
(b) a king
(c) the 10 of hearts.

The heights of the students of a class is measured and recorded as given below:

A student is selected at random. Find the probability that height of the students is :
(i) more than 135 cm
(ii) at least 145 cm
(iiii) less than 130 cm
(iv) 125 cm or more but less than 140 cm

In class IX of 50 students second language opted by the studnets is as follows:
Sanskrit-14
Japanese- 08
French-12
Urdu-06
Rest of then opted for German.
A student is selected at random. Find the probability that the student.
(a) opts for French
(b) does not opts for Japanese
(c) Either opts for Sanskrit or for German.

The percentage of marks obtained by a student in monthly unit test are given below:

Find the probability that in the next test the students sets
(i) more than 70% marks
(ii) less than 70% marks 
(iii) at least 60 marks

Mr. Kakkad's son Cheeku is sufering from a disease for 20 days and is hospitalised. Doctor asks Mr.Kakkad to donate blood in order to fulfill Cheeku's need. A pathologist tests and tells Mr.Kakkad, "Your blood group cannot be given to your son." After this Mr.Kakkad thinks of an idea and uploads a request of blood requirement on Facebook as soon as possible. In a short time, 85 blood of only three of them may be used for Cheeku.
(i) What is the probability that the blood group of a person chosen at random out of the donors cannot be given to Cheeku?
(ii) Which value is depicted by Mr.Kakkad regarding his son?
(iii) Which value (s) is (are) depicted by 85 blood donors?