Question

Please answer ASAP!!

Answer 1

Answer:

3. It is likely.

Step-by-step explanation:

Let's assume the dartboards circles have radius of r, 2r, 3r and 4r from inner side

Then the areas covered will be as:

• point 20 = πr² = S
• point 15 = π(2r)² - πr² = 3πr² = 3S
• point 1 0 = π(3r)² - π(2r)² = 5πr² = 5S
• point 5 = π(4r)² - π(3r)² = 7πr² = 7S

Total area of the dartboard is S+3S+5S+7S = 16S

The area of point 5 is 7S. And the area of non- 5 point is 16S - 7S = 9S

The probability of scoring at least 10 points is:

• 9S/16S = 0.5625

As it is between 1/2 and 1, the probability is in 'likely' region

So the correct answer choice is: 3. It is likely