Lesson 2 of 4 · Statement-based relation
Count members
Blood Relations · for IPMAT Indore, IPMAT Rohtak and JIPMAT · asked in JIPMAT 2021
The exam method
- Counting items. (sons, males, couples): list every person once with a sex mark, then count; for "each daughter has as many brothers as sisters" write the two equations b = g − 1 and g = 2(b − 1).
Worked examples
Example 4EasyJIPMAT 2021
In a family each daughter has as many brothers as sisters, and each son has twice as many sisters as brothers. How many sons are there?
Solution: 3. With b sons and g daughters: b = g − 1 and g = 2(b − 1), so b = 3 and g = 4.
Picked from the Statement-based relation note for this micro-concept automatically. The whole note: Statement-based relation.