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Q1. Option A
Number of questions attempted correctly = (70% of 10 + 40% of 30 + 60% of 35) = 7 + 12 + 21 = 40.
Questions to be answered correctly for 60% = 60% of total questions= 60 % of 75 = 45.
He would have to answer 45 – 40 = 5

Q2. Option A
5% of 1000 – 4% of 1000 = 10

Q3. Option A
15% of 34 = 15/100 x 34 = 5.10

 

 

 

 

 

 

 

 

 

 

 

 

Q5. Option D
It will be ½(1%) = ½(1/100) = 1/200 = 0.005

Q6. Option C
Total number of votes polled = 1136+7636+11628 = 204000
So, required percentage = 11628/20400 x 100 = 57%

Q7. Option C
While calculation in terms of percentage we need to multiply by 100, so 2.09 * 100 = 209.

 

 

 

 

 

 

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