Question

There are 20 students in Mr. Ling's mathematics class. Each student is equally likely to be chosen to

solve the Problem of the Day. Shania is in this class. What is the probability she will be chosen?
A. 0,05
B 0.20
0.25
D₂
0.50

Answer 1

Answer: The probability is 1/20, or in decimal form 0.05 (probability of 5%)

Explanation:

This is because there are 20 people in the class, including Shania. Since they are all equally likely and Shania is 1 out of the 20 students in the class, she has a 1 in 20 chance (which when simplified equals 0.05). When the symbol is added, you move the decimal 2 points to the right to get your probability, because a value of 1 is a 100% probability (as shown by the method took to find probability previously in the explanation, Shania/the number of people in the class: 1/20).