A student is required to answer 6 out of 10 questions divided into two groups each containing 5 questions. He is not permitted to attempt more than 4 from each group. In how many ways can he make the choice?

Find the probability that a letter chosen at random from the alphabet "Education " is either a vowel or one of the later

Here the student has to choose 6 questions from 10
Here there are 2 sections contains 5 from each section.
Student are not allowed to attend more than 4 questions from each sections
Here are the following possible way of taking questions from each sections
5C4 * 5C2 = 50
5C3 * 5C3 = 100
5C2 * 5C4 = 50
Summing up we get 200 as the possible choice we can make