URGENT !
to TINKUTARA developers:
because i didn′t get notification, i
have updated the app. but since the
update, i can′t either edit my own
posts or delete them.
i am using a Huawei P20, Android 9.
Hi.
A ballot box contains 3 red balls, 4 blues
balls and 5 white balls.
we draw successively 3 balls in ballot box
by re−puting the drawn balls.
1)Calculate the number of draws
containing one ball of each color.