Finding probability of drawing $4$ white ball

the probability of drawing $4$ white balls from an urn containing $10$ White ball , $4$ black and $3$ red balls ?

I have tried to use probability formula which is not working here

• The problem as stated is vague. Draw with or without replacement? – Ron Gordon Jul 8 '13 at 13:40
• yeah that what i am not understanding ! – SSK Jul 8 '13 at 13:41
• and in how many draws? – mm-aops Jul 8 '13 at 13:44
• Can you type the full question here, word to word? – dotslash Jul 8 '13 at 13:44
• yea i have typed word to word :) – SSK Jul 8 '13 at 14:02

Case 1 (with replacement): the successful outcome is to have $4$ successes out of $4$ trials, and the probability is fixed: $\big(\frac{10}{17}\big)^4$
Case 2 (without replacement): same, but the number of white and total balls reduces after each sample: $\frac{10}{17} \cdot \frac{9}{16} \cdot \frac{8}{15} \cdot \frac{7}{14}$