Question

please answer 3rdand4th in detail
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Answer 1

Answer:

3rd one- 1:10

4ths one-6:1

Step-by-step explanation:

3rd one- ratio is nothing but fraction itself.by the question's feaction (1 by 10th )we get to know that the no. of teachers is 1 out of ten or out of a whole pizza(students) which had 10 divisions, only 1 division is equal to the teacher. we can also write the ans as 0.1:1

4th one-it is the same explaination. there is a pizza which has 6 (passed students)divisions. amount of pizza left in another box(failed)is 1 /6 which means that if u divide the whole pizza(passed) so that there are 6 pieces, the ammount of pizza in another box(failed) is one of the remaining pieces. so total there are 7 pieces.

pl feel free to ask any doubts

Answer 2

3rd answer is 1:10

for steps refer to attachment