7/12 < 2/3 < 3/4 is the correct answer
21/4 ÷ 14/9
21/4 × 9/14
189/56
3/3/8
Answer: 720 ways
Step-by-step explanation:
Given
A train has 1 main engine and remaining 6 train cars
If the engine is always in the front the remaining train cars can be arranged is
