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Following table shows the grades obtained by the students of four sections viz. A, B, C and D of class Tenth of Ram Manohar Boys School. Answer the following questions using the information provided.   Grades Sections First Second Third A 12 18 25 B 10 23 17 C 8 22 15 D 14 24 12 If a student of class tenth of the school is randomly selected, what are the chances that he either “belongs to section B and got first grade” or “belongs to section D and got third grade”?

Following table shows the grades obtained by the students of four sections viz. A, B, C and D of class Tenth of Ram Manohar Boys School. Answer the following questions using the information provided.   Grades Sections First Second Third A 12 18 25 B 10 23 17 C 8 22 15 D 14 24 12 If a student of class tenth of the school is randomly selected, what are the chances that he either “belongs to section B and got first grade” or “belongs to section D and got third grade”? Correct Answer 11%

Given:

Total number of students in section A is 55.

Total number of students in section B is 50.

Total number of students in section C is 45.

Total number of students in section D is 50.

Calculation:

Total number of students in the school is,

⇒ 55 + 50 + 45 + 50

⇒ 200

Students belong to section B and got the first grade,

⇒ 10

Students belong to section D and got the third grade,

⇒ 12

Percent of students,

⇒ (10 + 12)/200 × 100

⇒ 22/200 × 100

⇒ 11

∴ The chances are 11%.

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