Mathematics
The percentage of marks obtained by a student of class X in four unit tests are given below :
| Unit test | I | II | III | IV |
|---|---|---|---|---|
| Marks secured % | 62 | 69 | 33 | 86 |
A test is selected at random. What is the probability that the student gets 69% marks in the test ?
Related Questions
A die is thrown 300 times and outcomes are noted as given below :
Outcomes 1 2 3 4 5 6 Frequency 50 73 55 44 45 33 When the same die is thrown once more, what is the probability of getting :
(i) 4 ?
(ii) 6 ?
(iii) 5 ?
(iv) 2 ?
The following table shows the relationship between the monthly incomes and the number of vehicles in a family. If 2000 families, in a locality, are selected, the information gathered is listed in the table below :
Monthly income (₹) 0 vehicle 1 vehicle 2 or more than 2 vehicles Less than 10,000 1 140 13 10,000 - 12,000 2 285 17 12,000 - 14,000 0 515 0 14,000 - 16,000 0 449 9 16,000 or more 3 559 7 A family is chosen, write the probability that the family chosen is :
(i) earning ₹ 10,000 - ₹ 12,000 per month and owning exactly 1 (one) vehicle.
(ii) earning ₹ 14,000 or more per month and owning 2 or more than 2 vehicles.
(iii) not owning more than 1 vehicle.
A square dartboard has sections numbered from 1 to 12 as shown below. Players have to make a prediction and throw a dart. They win if their dart lands on the section that matches their prediction. Three friends Amit, Aryan and Aman took the challenge.
Based on the above information, answer the following :
(i) What is the probability of Amit winning if he predicted that his dart will land on a prime number ?
(ii) What is the probability of Aryan winning if he predicted that his dart will land on an odd number ?
(iii) What is the probability of Aman winning if he predicted that his dart will land on a square number ?
(iv) Which of the three friends has the highest chance of winning ?