Teaching Haryana (HPSC) Assistant Professor Mock Test 2025 Mathematical Science Statistics & Exploratory Data Analysis Independent Random Variables
There are 30 questions in a certain multiple choice examination paper. Each question has 4 options and exactly one is to be marked by the candidate. Three candidates A, B, C mark each of the 30 questions at random independently. The probability that all the 30 answers of the three students match each other perfectly is
1
60-4
2
30-4
3
4-30
4
4-60
5
Question Not Attempted