SSC CHSL 202151)Pawan travels from X to Y at the speed of 10 km/h, from Y to Z at 15 km/h and from Z to W at 20 km/h. If XY = YZ = ZW (in km), then the average speed of Pawan for the whole journey is:

Correct Option: D

\(13\frac{11}{13}\) km/h

SSC CHSL 202152)The average of 40 numbers is 48.2. The average of the first 15 numbers is 45 and that of the next 22 numbers is 50.5. The 38

^{th}number is 1 more than the 39^{th}number, and the 39^{th}number is 3 less than the 40^{th}number. What is the average of the 39^{th}and 40^{th}numbers?

Correct Option: D

47.5

SSC CHSL 202153)The average age of 7 members of a family is 35 years. If the youngest members are twins and they are 15 years old, then what was the average age (in years) of the family members at the time of the birth of the twins?

Correct Option: B

28

SSC Selection Post Matric 202254)The average height of 20 students of Class 9 is 147 cm and the average height of 15 students of Class 10 is 154 cm. What is the average height (in cm) of the students of the two Classes?

Correct Option: C

150

SSC Selection Post Matric 202255)The average of the numbers 52, 87, k, 103, 48, (k+4), 51 is 63. What is the value of k?

Correct Option: A

48

SSC Selection Post Matric 202256)There are five numbers whose average is 72. If the first number is one-fifth of the sum of the other four numbers, then the first number is:

Correct Option: C

60

SSC Selection Post Matric 202257)The average weight of a class of 20 students is 44 kg. A new student joins the class and the average weight decreases by 300 gm. What is the weight of the new student (in kg)?

Correct Option: A

37.7

SSC Selection Post Matric 202258)The average weight of 18 boxes in a boat is increased by 2.5 kg when one of the boxes weighing 75 kg is replaced by a new box. The weight (in kg) of the new box is:

Correct Option: A

120

SSC Selection Post Matric 202259)A museum has an average of 340 visitors on Sunday and 160 on other days. What is the average number of visitors per day in the month of June beginning with Sunday?

Correct Option: C

190

SSC Selection Post Matric 202260)In a class of 60 students (boys and girls), there are 60% girls. In an examination, the average score of the boys is 52 and that of the girls is 65. What is the average score of the whole class?

Correct Option: D

59.8

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