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A certain jewelry store sells customized pendants in which t
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11 Jun 2018, 08:31
11 Jun 2018, 08:31
Expert Reply
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Question Stats:
44% (01:02) correct
55% (02:25) wrong based on 9 sessions
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A certain jewelry store sells customized pendants in which three gemstones selected by the customer are set in a straight row down the center of the pendant. If exactly 5 different types of the gemstone are available, and if at least two of the gemstones in any given pendant must be different, how many different pendants are possible?
A. 20
B. 60
C. 90
D. 120
E. 210
A. 20
B. 60
C. 90
D. 120
E. 210
Re: A certain jewelry store sells customized pendants in which t
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12 Nov 2018, 06:59
12 Nov 2018, 06:59
1
Expert Reply
Carcass wrote:
A certain jewelry store sells customized pendants in which three gemstones selected by the customer are set in a straight row down the center of the pendant. If exactly 5 different types of the gemstone are available, and if at least two of the gemstones in any given pendant must be different, how many different pendants are possible?
A. 20
B. 60
C. 90
D. 120
E. 210
A. 20
B. 60
C. 90
D. 120
E. 210
EXPLANATION
A short approach to the question would be..
let us find total ways of choosing gemstones without restrictions = 5*5*5=125
How many of these have all three same - 5 ways
so Total = 125-5=120
D
Re: A certain jewelry store sells customized pendants in which t
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29 Dec 2020, 04:47
29 Dec 2020, 04:47
I'd choose d, the explanation seems to be pretty logical, tbh
