Q.176- The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg.)A. 55 kgB. 57 kgC. 66 kgD. 56 kg Q.177- Five years ago, the average age of P and Q was 25. The average age of P, Q and R today is 25. Age of R after 5 years will be :A. 15 yearsB. 20 yearsC. 40 yearsD. 35 years Q.178- Fifteen movie theatres average 600 customers per theatre day. If six of the theatres close down but the total theatre attendance stays the same , then the average daily attendance per the remaining theatres is.A. 900B. 1000C. 1100D. 1200 Q.179- If the mean of 4 observations is 20, when a constant ‘c’ is added to each observation, the mean becomes 22. The value of c is :A. 6B. −2C. 2D. 4 Q.180- The average age of 30 students is 9 years. If the age of their teacher is included, the average age becomes 10 years. The age of the teacher (in years) is :A. 27B. 31C. 35D. 40 Time is Up! Time's up