Probability of Union of Events

What is the probability of the arrow stopping on a consonant or one of the first 4 letters of the alphabet?

• 5/6

• 1/36

• 1/3

• 1/6

A coin and a number cube with the numbers 1 through 6 are tossed. What is the probability of the coin showing tails and the number cube showing the number 3? 

• 1/12
• 1/4
• 1/8
• 1/2

On a 6-sided die, which is more likely?

• Rolling an odd number
• Rolling an even number
• They are both equally likely.

The extracurricular activities in which the grade 6 class at Senator Claro M. Recto Memorial Integrated School participate last school year are shown in the Venn diagram.

1. How many students are in the grade 6 class?

• 288

• 278

• 248

• 218

2. How many students participate in athletics?

• 127

• 135

• 149

• 169

7. Find P(M U S)

• 0.60

• 0.40

• 0.45

• 0.15

8. Find P(M')

• 0.35

• 0.60

• 0.65

• 0.80

• 0.15

• 0.60

• 0.65

• 0.85

4. If a student is randomly chosen, what is the probability that the student participates in band or athletics?

• 217/288

• 115/144

• 1/16

• 2/137

3. If a student is randomly chosen, what is the probability that the student participates in athletics or drama?

• 5/48

• 7/144

• 217/288

• 3/288