In an examination, a student score 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempts correctly is
35
40
42
46
Find a number, one-seventh of which exceeds its eleventh part by 100.
1925
1825
1540
1340
The value of is
0
2.994
3.208
3
D.
3
Let 3.2 = a and 0.2 = b
or
Mohan gets 3 marks for each correct sum and loses 2 marks for each wrong sum. He attempts 30 sums and obtains 40 marks. The number of sums solved correctly is
25
10
15
20