10 students of Elena's classmates like to make jewellery.
Explanation:
Let total no.of classmates who liked the jewellery = x
Here, in the given problem, given she asked her classmates '20'. So, it clearly shows that total number of students/classmates = 20. Also, in that, 50% said like to make jewellery. Now find 'x' as below,
![x = 50 \% \text { of } 20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/mta3kmtv2qhw9v39fxphl3dza3ubrq3qlu.png)
![x = (50)/(100) * 20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/bs02mz53bjwlr6txgnvd55pyp86nzhrgki.png)
![x = 10](https://img.qammunity.org/2020/formulas/mathematics/high-school/1qvz7c2ob0nxur0rmw3vk1un5g2s7k9ppg.png)
Hence, the total number of classmates who liked to make Jewellery = 10