Question

The average marks obtained by 240 candidates in a certain examination is 70. If the average marks of passed candidates is 78 and that of failed candidates is 30, then find the total no of passed candidates in the examination?

• A. 180
• B. 200
• C. 220
• D. 240

Answer 1

Answer:

B. 200

Let passed candidates be x, Failed candidates = 240 – x Total marks,=(240*70) = 78x + (240 – x)*30 16800 = 78x + 7200 – 30x 9600 = 48x X= 9600/48 = 200