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6. There are 30 students in the group. The marks for the control test were the following 8 students received "excellent" marks, 12 students recieved "good" marks, 8 students "satisfactory" What is the
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6. There are 30 students in the group. The marks for the control test were the following 8 students received "excellent" marks, 12 students recieved "good" marks, 8 students "satisfactory" What is the probability that students invited for answer have "good" marks​

User Ttom
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Answer:

Explanation:

The sampling is based on the 28 who received marks. (Not the 30 in the group - 2 didn't submit a test).

Excellent 8 28.57%

Good 12 42.86%

Satisfactory 8 28.57%

The proability for having a "Good" mark is 42.86%

User Sawan Mishra
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