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Mathematics 21 Online
snowflake0531:

@florisalreadytaken thoroughly confused

snowflake0531:

sorry i can't probability at all .-.

Florisalreadytaken:

hmm ok, so whats the general probability for a person to be bald?

snowflake0531:

40/100, 40%

Florisalreadytaken:

lets keep it as a fraction \[ \frac{4}{10} = \frac{2}{5}\]

snowflake0531:

ok-

Florisalreadytaken:

now you have to find the probability for a person to be bald who is OVER 45 yo

snowflake0531:

16/40 = 2/5

Florisalreadytaken:

voila -- same probability -- that means they are independent -- which option would be the right one?

snowflake0531:

uh teh last?

snowflake0531:

or the second? o-o

Florisalreadytaken:

why would it be the 2nd one?

snowflake0531:

actually uh yea the last._. they're independent

Florisalreadytaken:

we just saw that they ARE independent -- so nah yeah well done!

snowflake0531:

yes yes ty xdd

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