Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
12 kg of rice costing 30 per kg is mixed with 8 kg of rice costing 40 per kg.The average per kg price of mixed rice is
38
37
35
34
If average of 20 observations x1, x2, ....., x20 is y, then the average of x1 – 101, x2 – 101, x3 – 101, ....., x20 –101 is
y – 20
y – 101
20y
101y
The average weight of five persons sitting in a boat is 38 kg. The average weight of the boat and the persons sitting in the boat is 52kg. What is the weight of the boat ?
228 kg
122 kg
232 kg
242 kg
The average of the marks obtained in an examination by 8 students was 51 and by 9 other students was 68. The average marks of all 17 students was :
59
59.5
60
60.5
A library has an average number of 510 visitors on Sunday and 240 on other days. The average number of visitors per day in a month of 30 days beginning with Sunday is :
285
295
300
290
