Out of 8000 candidates, 60% were boys. If 80% of the boys and 90% of the girls passed the exam, find the number of candidates who failed.
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Total candidates =8000
Total candidates =8000Number of boys 800×
Total candidates =8000Number of boys 800× 100
Total candidates =8000Number of boys 800× 10060
Total candidates =8000Number of boys 800× 10060
Total candidates =8000Number of boys 800× 10060 =4800
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800×
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800× 100
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800× 10020
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800× 10020
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800× 10020 =960 (80% passed)
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800× 10020 =960 (80% passed)Number of girls failed 3200×
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800× 10020 =960 (80% passed)Number of girls failed 3200× 100
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800× 10020 =960 (80% passed)Number of girls failed 3200× 10010
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800× 10020 =960 (80% passed)Number of girls failed 3200× 10010
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800× 10020 =960 (80% passed)Number of girls failed 3200× 10010 =320
Total candidates =8000Number of boys 800× 10060 =4800Number of girls 8000−4800=3200number of boys fail 4800× 10020 =960 (80% passed)Number of girls failed 3200× 10010 =320Total failed =1280
Answer:
Total candidates =8000
Number of boys 800×
100
60
=4800
Number of girls 8000−4800=3200
number of boys fail 4800×
100
20
=960 (80% passed)
Number of girls failed 3200×
100
10
=320
Total failed =1280
Step-by-step explanation: