Explanation

Total number of balls = Blue + Yellow + Red  

Total = 9 + 7 + 4 = 20  

Number of red balls = 4  

Probability of picking a red ball = Number of red balls / Total number of balls  

= 4 / 20  

= 1 / 5  

Verified & Updated

Explanation

Total number of balls = Red balls + Blue balls  

Total = 5 + 3 = 8  

Number of red balls = 5  

Probability of picking one red ball = Number of red balls / Total number of balls  

Probability = 5 / 8  

Verified & Updated

Explanation

Total balls = 1 + 2 + 3 = 6

Red balls = 3

Probability = 3/6 = 1/2

Verified & Updated

Explanation

Total balls = 6 red + 4 blue + 5 green = 15  

Number of blue balls = 4  

Probability of selecting a blue ball = Number of blue balls / Total balls  

= 4 / 15

Verified & Updated

Explanation

• The formula for probability is: Favorable Outcomes ÷ Total Outcomes.
• Probability measures the chance of an event occurring.
• Its value always lies between 0 and 1.
• 0 means the event is impossible, while 1 means it is certain.
• It is widely used in mathematics, statistics, and everyday decision-making.

Last verified on 12-07-2026