Arithmetic - Online Test
Q1. In an examination, Mandar scored 80 marks in Mathematics, 95 marks in Science, 74 marks in Social Studies, 65 marks in English and 72 marks in Hindi. If all the papers were out of 100, what is Mahdar's over all percentage in the examination?
Answer : Option B
Explaination / Solution:
Total marks scored by Mandar = 80 + 95 + 74 + 65 + 72 = 386
Over all percentage = (386/500) × 100 =77.2
Hence option B is correct
Q2. A and B can do a work respectively in 4 days and 8 days when working alone. if they work on the alternate days then in how many days the work will be completed if A starts the work?
Answer : Option A
Explaination / Solution:
2 day's work of A and B = (1/4 + 1/8) = 3/8
so 2*2 = 4 day's work of A and B = 2*(3/8) = 3/4
Rest of work = 1-(3/4) = 1/4
After 4 days completion, A will again come for completing the remaining work.
Hence, Time taken by A to complete 1/4th of the work = 1/4*4 = 1 day
So total work will be completed in 4+1 = 5 days
