Question
If tan 3.5θ x tan 6.5θ = 1 then the value of
tan 5θ isSolution
The average weight of 36 students in a class is 62 kg. When two new students having weights (m + 8) kg and (m β 6) kg joined, the average weight dropp...
- The earnings of βUβ, βVβ, and βWβ are in the ratio 2:3:5. Their average income is Rs. 18,000. If they spend 45%, 55%, and 65% of their respecti...
Average weight of all the people in a group is 66 kg. When two people of weight 72 kg and 84 kg left the group, average weight reduces by 1.2 kg. Find t...
There are 15 numbers such that average of first 12 numbers is 60 while the average of last five numbers is 75. Find the 12th number, if the ratio betwee...
The average of four numbers is 68. When four more numbers are included, the average increases by 6. Find the average of the numbers included.
In an examination the average marks of Rohit is 55. If he got 15 more marks in science and 27 more marks in maths then his average would have been 61. F...
The average mark obtained by 120 candidates in a certain examination is 50. If the average marks of passed candidates are 55 and that of the failed cand...
The average of 20 numbers is 75. The average of the first 12 numbers is 80, while the average of the last 11 numbers is 68. If the 12th number is remove...
In a school, there are 30 male students and 20 female students. The average marks of male students is 58 and that of female students is 62. Calculate th...
The average mark obtained by 160 candidates in a certain examination is 55. If the average marks of passed candidates are 60 and that of the failed cand...
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