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A card is lost from a pack and the cards drawn are spades: probability the lost card is a spade

This type of question, asked 2 times: 2021 Paper 5, 4 Apr 2025. All 2 questions below, oldest first.

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  1. Question 1

    2021 Paper 5

    75
    A pack of cards has one card missing. Two cards are drawn randomly and are found to be spades. The probability that the missing card is not a spade, is:

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  2. Question 2

    4 Apr 2025

    148
    A card from a pack of 52 cards is lost. From the remaining 51 cards, n cards are drawn and are found to be spades. If the probability of the lost card to be a spade is 1150\frac{11}{50}, the n is equal to.