The following question consists of two statements I and II are given below. You have to decide whether the data provided in the statements are sufficient to answer the question.

The average age of teacher and students in a class is 3 years more than the average age of students. What is the age of the class teacher?

I. There are 11 students in the class.

II. The average age of teacher and students is 14 years.

(a) The data in statement I alone was sufficient to the answer the question while II alone not sufficient to the answer the question.

(b) Data in statement II alone are sufficient to answer the question while data in statement I alone are not sufficient to answer the questions.

(c) The data in statement I alone or in statement II alone are sufficient to answer the questions.

(d) The data in both statements I and II are sufficient to answer the question.

The following question consists of two statements I and II are given below. You have to decide whether the data provided in the statements are sufficient to answer the question.

The average age of teacher and students in a class is 3 years more than the average age of students. What is the age of the class teacher?

I. There are 11 students in the class.

II. The average age of teacher and students is 14 years.

(a) The data in statement I alone was sufficient to the answer the question while II alone not sufficient to the answer the question.

(b) Data in statement II alone are sufficient to answer the question while data in statement I alone are not sufficient to answer the questions.

(c) The data in statement I alone or in statement II alone are sufficient to answer the questions.

(d) The data in both statements I and II are sufficient to answer the question.

1 Answer

5876 Votes

3537

Average age of 11 students and 1 teacher = 14 yrs.

Total age of (11 students and 1 teacher) = 14yrs.

Average age of 11 students and 1 teacher =(Average age of 11 students) + 3

Average age of 11 students = 14yrs.

Total age of 11 students = (11)= 121 yrs.

Age of the teacher = yrs.

So, both I and II together give the answer.

A submarine (A) travelling at 18 km/hr is being chased along the line of its velocity by another submarine (B) travelling at 27 km/hr. B sends a sonar signal of 500 Hz to detect A and receives a reflected sound of frequency v. The value of v is close to : (Speed of sound in water = 1500 ms^{–1})

a) |
499 Hz |
b) |
504 Hz |

c) |
507 Hz |
d) |
502 Hz |

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