Asked by peter

A compact disc is placed in a player that randomly selects and plays songs from the disc.The compact disc contains 3 ballads, 4 instrumental pieces,X dance tracks and no other pieces.If the probability that the first song played will be a ballad is 1/4,what is the value of X?
Answered by Steve
since there are 3 ballads, and 1/4 of the total are ballads, there must be 12 songs in all. That help?
Answered by peter
could you show me how to do it
Answered by peter
is it 3 / 1/4 = 12 ?
Answered by Reiny
pieces on disc
= 3 + 4 + x
= x+7

prob of picking one of the 4 ballads
= 4/(x+7)
but we are told
4/(x+7) = 1/4
x+7 = 16
x = 9

Answered by Steve
one hitch is that there are only 3 ballads.

Anyway, peter, fix that and redo Reiny's calculations to find that x=5.

As for my hint, since there must be 12 songs in all, the missing x pieces must total 5.
Answered by Crystal
4/(x+7)=1/4
x+7=16
x=9
Answered by Alison
Help I don't understand sorry for this but help stil don't understand THANKS
VERY
MUCH
Answered by Alison
Fishy
Answered by Alison
Me like to eat
From Alison Chen
Princess is the only person I can trust and understand how to help me
Truth I am a boy but my mom accident give me a girl name
I love princess princess so much princess princess is princess princess is princess princess

Prince prince
There are no AI answers yet. The ability to request AI answers is coming soon!