Question

student attend a 20 marks test no negative marking are given in the test each question 1 marks find the probability that student score 30 or more marks

Answer 1

Answer:

Step-by-step explanation:

Since no negative marks are given in the test,

Possible outcomes=(0,1,2,3,4.........50) 

Number of possible outcomes=51

Probability of scoring 30=1/51 (since there is only 1 chance of 30 coming)

Probability of scoring 35=1/51 (same reason as above)

Total probability=1/51+1/51=2/51.

Ans:The probability that he scores 30 marks or 35 marks is 2/51.

Answer 2

the probablity is 0 or the event cannot happen becuase the total mark is of 20 therefore getting 30 marks and more is not possible