- Books Name
- CBSE Class 7 Mathematics Book
- Param Publication
- CBSE Class 7
In an examination, 96% of the candidates passed & 50 failed. How many candidates appeared ?
Let the number of candidates appeared be x
Percentage of those who passed = 96%
Percentage of those who failed = (100 – 96)% = 4 %
Number of failures = 4% of x.
∴ 4% of x = 50
Hence, the number of candidates appeared is 1250.
(i) Chalk contains calcium, carbon and oxygen in the ratio 10 : 3 : 12, find the % of carbon in chalk.
(ii) If in a stick of chalk, carbon is 3g, what is the weight of the chalk stick ?