Explanation

• Mean = (4 + 7 + 8 + 10 + 12) ÷ 5
• Mean = 41 ÷ 5 = 8.2
• Mean is the average value of a data set.

Last verified on 08-06-2026

Explanation

Sample space when rolling a dice: {1, 2, 3, 4, 5, 6} → 6 outcomes

Numbers divisible by 2: {2, 4, 6}  

Numbers divisible by 3: {3, 6}

"Or" means union. Combine them but don't double-count 6:  

Divisible by 2 or 3 = {2, 3, 4, 6} → 4 outcomes

Probability = Favorable / Total = 4/6 = 2/3

Formula way: P(A∪B) = P(A) + P(B) - P(A∩B) = 3/6 + 2/6 - 1/6 = 4/6 = 2/3

Last verified on 08-06-2026

Explanation

For a fair coin there are 2 outcomes: Head or Tail. Both equally likely.

So P(Head) = 1/2 = 0.5 = 50%

Unless the coin is biased or standing on its edge.

Last verified on 07-06-2026

Explanation

Explanation

Add them up and divide by how many numbers there are.

16 + 18 + 20 = 54  

54 ÷ 3 = 18

So the mean is 18.

Last verified on 25-05-2026