A survey of 1200 students recorded daily study hours: under 1 hr: 180, 1-2 hr: 480, 2-3 hr: 360, over 3 hr: 180. What is the experimental probability that a student studies at least 2 hours but the count is then checked: how many students study less than 2 hours?

Question

Accepted Answer

P = 0.45, 660 students. At least 2 hr = 360 + 180 = 540, P = 540/1200 = 0.45. Less than 2 hr = 1200 - 540 = 660 students.

A survey of 1200 students recorded daily study hours:
under 1 hr: 180, 1-2 hr: 480, 2-3 hr: 360, over 3 hr: 180.
What is the experimental probability that a student studies at least 2 hours but the count is then checked: how many students study less than 2 hours?

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More Class 9 Experimental Probability practice

A survey of 1200 students recorded daily study hours:under 1 hr: 180, 1-2 hr: 480, 2-3 hr: 360, over 3 hr: 180.What is the experimental probability that a student studies at least 2 hours but the count is then checked: how many students study less than 2 hours?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Experimental Probability practice

A survey of 1200 students recorded daily study hours:
under 1 hr: 180, 1-2 hr: 480, 2-3 hr: 360, over 3 hr: 180.
What is the experimental probability that a student studies at least 2 hours but the count is then checked: how many students study less than 2 hours?