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How mant different nine digit numbers can be formed from the number 223355888 by rearranging its digits so that odd digits occupy even positions How mant different nine digit numbers can be formed from the number 223355888 by rearranging its digits so that odd digits occupy even positions
O E O E O E O E OThere are 9positions, 5 odd and 4 even.Also, there are 4 odd digits and 5 even digits.No. of ways in which odd digits can occupy evenpositions= 4! / (2! 2!)No. of ways in which even digits can occupy oddpositions= 5! / (3! 2!)Hence, required no. of ways = (4! 5!) / (2! 2! 3! 2!) = 60ThanksBharat Bajajaskiitians facultyIIT Delhi
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