Question
Which of the following pair is correct? I.
Opaque – do not allow light to pass through them II. Translucent – allow light to pass through them partiallySolution
Opaque objects: Objects that do not allow light to pass through them and prevent see-through are called opaque objects. Example wood, plate, iron rod, etc. Translucent objects: Objects that allow the most light to pass through them (but not whole) and help in seeing things partially through it are called translucent objects. Example: filter paper.
The average of 18 numbers is 40, and the average of the first 9 numbers is 45. Find the average of the remaining 9 numbers.
The average age of a group of 12 students is 32 years. Two persons of age 40 years and 31 years, left the group and 2 persons of age 54 years and...
- David scored 144 runs in a match, and that made up 80% of the total team score. If 10 runs were added as extras, how many runs did the other players contri...
- The average height of a group of 30 players was recorded as 168 cm. Later it was discovered that 172 was wrongly written as 182 and 160 was written as 150....
The average of five even numbers is 74. If we replace two of these even numbers, 84 and 96, with a single even number X, the new average decreases by 4....
Average weight of a team of 10 persons is 30 kg. When one more person joins the team, the average weight of the team increases by 3 kg. Find the weight ...
In a family of 10, the men eat on average 65 kg of food and women eat on an average 45 kg of food. The men and women are equal in number. A woman...
A student got an average score of certain marks in the first 16 tests. In the next 4 tests, she scored 76 marks on average. This raised her overall aver...
The average age of 32 children and their teacher's age are 28 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
A bowler gives 15.2 runs per wicket. He gives 32 runs and takes 4 wickets in the last match after which his average becomes 14.4 runs per wicket. How ma...
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