A wire of a given material has length ‘l’ and resistance ‘R’. Another wire of the same material having three times the length and twice the area of cross section will have a resistance equal to:
A group of class IX students conducted a survey for the number of family members in a household on 40 households in a locality, which resulted in the given frequency table. What is the mode of the data?
| Family size | Number of families |
| 2-4 | 10 |
| 4-6 | 8 |
| 6-8 | 12 |
| 8-10 | 6 |
| 10-12 | 4 |