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Is there a way to ask questions about the material on study.com? Or is it just do what you can? Once again I've run into something where either I don't understand what is presented or study.com is wrong. Problem in question (if any of you know what the answer to this is, lmk?). I thought this seemed straightforward but study.com has an answer and explanation that doesn't make sense to me. Maybe I should just move on and forget it, but it bothers me.
The numbers 1 through 20 are written on separate slips of paper and placed in a hat. One of the slips is randomly drawn. What is the probability that either a prime number or a number less than 10 is drawn?
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05-09-2018, 08:49 AM
(This post was last modified: 05-09-2018, 09:23 AM by davewill.
Edit Reason: Fixed error pointed out below
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Should be 9+4(1-9,11,13,17,19) over 20
12/20 = 6/10 = 60%
13/20 = 65%
NanoDegree: Intro to Self-Driving Cars (2019)
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TESU: BA in Comp Sci (2016)
TECEP:Env Ethics (2015); TESU PLA:Software Eng, Computer Arch, C++, Advanced C++, Data Struct (2015); TESU Courses:Capstone, Database Mngmnt Sys, Op Sys, Artificial Intel, Discrete Math, Intro to Portfolio Dev, Intro PLA (2014-16); DSST:Anthro, Pers Fin, Astronomy (2014); CLEP:Intro to Soc (2014); Saylor.org:Intro to Computers (2014); CC: 69 units (1980-88)
PLA Tips Thread - TESU: What is in a Portfolio?
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THANK YOU. My own simple mistake - counting 15 as a prime when it isn't. (BTW it's 13/20, you forgot 11, which is prime
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05-09-2018, 09:20 AM
(This post was last modified: 05-09-2018, 09:23 AM by davewill.)
(05-09-2018, 09:03 AM)fork Wrote: THANK YOU. My own simple mistake - counting 15 as a prime when it isn't. (BTW it's 13/20, you forgot 11, which is prime )
So, I did. I fixed it above so that people don't find the wrong answer.
NanoDegree: Intro to Self-Driving Cars (2019)
Coursera: Stanford Machine Learning (2019)
TESU: BA in Comp Sci (2016)
TECEP:Env Ethics (2015); TESU PLA:Software Eng, Computer Arch, C++, Advanced C++, Data Struct (2015); TESU Courses:Capstone, Database Mngmnt Sys, Op Sys, Artificial Intel, Discrete Math, Intro to Portfolio Dev, Intro PLA (2014-16); DSST:Anthro, Pers Fin, Astronomy (2014); CLEP:Intro to Soc (2014); Saylor.org:Intro to Computers (2014); CC: 69 units (1980-88)
PLA Tips Thread - TESU: What is in a Portfolio?
