SAT Practice Test: Video 8 Answers (25 Questions)

Question 1

A study with a small margin of error generally indicates:

Accepted Answer

A more precise estimate

Answer

A smaller margin of error means the estimate is more precise.

Question 2

A restaurant survey shows that 40% of customers order a salad, 35% order soup, and 15% order both. What percentage orders at least one of these?

Accepted Answer

60%

Answer

P(A or B) = P(A) + P(B) - P(A and B) = 40% + 35% - 15% = 60%.

Question 3

A bag has 4 red and 6 blue marbles. What is the probability of drawing two red marbles in a row without replacement?

Accepted Answer

2/15

Answer

P(first red) = 4/10. P(second red | first red) = 3/9. P(both) = 4/10 × 3/9 = 12/90 = 2/15.

Question 4

A train travels at 60 mph for 2 hours and then at 80 mph for 1 hour. What is the total distance?

Accepted Answer

200 miles

Answer

Distance = rate × time. First part: 60 × 2 = 120 miles. Second: 80 × 1 = 80 miles. Total = 120 + 80 = 200 miles.

Question 5

What is the area of a triangle with a base of 8 units and a height of 6 units?

Accepted Answer

24 square units

Answer

The area of a triangle is calculated using the formula A = (1/2) * base * height. Given a base of 8 units and a height of 6 units, the calculation is (1/2) * 8 * 6. This simplifies to (1/2) * 48, which results in an area of 24 square units.