Question
How many students appeared for RBI GRADE-A
exam? Study the following information carefully and answer the given questions: 7 Person M, N, O, P, Q, R and S belong to 7 different countries namely England, Thailand, America, Canada, Germany, China and France. They are appearing for different exams- SSC CGL, IBPS PO and RBI GRADE-A. At-least 2 students appear for a single exam. R and the person belongs to Canada appeared for the same exam. The person who belongs to Thailand, S and N appeared for same exam. P belongs to neither America nor Germany. Q appeared for RBI GRADE-A but does not belong to Thailand. The person who belongs to America and Thailand appeared for SSC CGL. R appeared for neither IBPS PO nor belongs to Germany. S belongs to Canada. P did not appear for IBPS PO. O belongs to China and appeared for IBPS PO. The person who belongs to France appeared for IBPS PO.Solution
The person who belongs to Thailand appeared for SSC CGL. And S, N and the person who belongs to Thailand appeared for same exam. So, S and N also appeared for SSC CGL. O belongs to China and appeared for IBPS PO. S belongs to Canada. Q appeared for RBI GRADE-A. 
R and the person who belongs to Canada appeared for same exam. Therefore, R appeared for SSC CGL. The person who belongs to America appeared for SSC CGL. The person who belongs to France appeared for IBPS PO. P neither belongs to America nor Germany. So, P belongs to England. Q does not belong to Thailand. Therefore R belongs to Thailand. Final table 
Find the simplified value of the given expression:
18 × 3 ÷ 6 + 24 ÷ 4 of 2 − 60 ÷ 2 of 3 + 18 × 5 ÷ 9.
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