这几道题都是关于数学哪方面知识的?1.An urn contains six red,three white,and two blue marbles.In how many ways can three marbles be selected so that at least one is blue?2.A man has a penny,a nickel,a dime,a quarter,and a half-dollar co
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这几道题都是关于数学哪方面知识的?1.An urn contains six red,three white,and two blue marbles.In how many ways can three marbles be selected so that at least one is blue?2.A man has a penny,a nickel,a dime,a quarter,and a half-dollar co
这几道题都是关于数学哪方面知识的?
1.An urn contains six red,three white,and two blue marbles.In how many ways can three marbles be selected so that at least one is blue?
2.A man has a penny,a nickel,a dime,a quarter,and a half-dollar coin in his pocket.The man reaches into his pocket and selects three coins.How many different sums can he three coins form?
3.Five cards are drawn from a standard deck of 52 cards.How many different hands of five cards contain four of a kind(four cards of the same rank plus one additional card)?
4.An ice cream store has 31 flavors to select from.A customer wants to select two different flavors.How many ways can the customer make this selection?
5.A set contains five elements.How many subets can be formed from the set?
这几道题都是关于数学哪方面知识的?1.An urn contains six red,three white,and two blue marbles.In how many ways can three marbles be selected so that at least one is blue?2.A man has a penny,a nickel,a dime,a quarter,and a half-dollar co
1.27/55
2.$0.31 $0.56 $0.76 $0.8
3.4165
4.465
5.120