Assessment Exam Numerical Ability Permutation and Combination

in how many ways can the letters of the word CONTACT be arranged without changing the order of the vowels?

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Assessment Other Question

a pack contains n cards numbered 1 to n .Two consecutive cards are removed from the pack and sum of remaining card is 1224.If smaller of number on the removed card is k.Find value of k-20 A vendor fixed Selling Price of a product at 40% above the cost price. He sells half the stock at this price, one-quarter of that stock at a discount of 25% on the original selling price and rest at a discount of 30% on the original selling price. Find the gain percentage all together?