Question

Question 3. (20 pts.) 1. A drawer contains black, brown, and white socks. How many socks ensure two of the same color? 2. With 2,0,3 and 6 how many three digits even numbers can be generated without replacements? 3. We selected 20 persons by the random. What is the probability that only 3 of them have the same birthday at August? Find the probability that only 3 of them have the common month for their birthday? A42
1. 2. 3. A drawer contains black, brown, and white socks. How many socks ensure two of the same color? With 2,0,3 and 6 how many three digits even numbers can be generated without replacements? We selected 20 persons by the random. What is the probability that only 3 of them have the same birthday at August? Find the probability that only 3 of them have the common month for their birthday?

Answer 1

1. If a drawer contains black, brown, white socks, In the worst case if the first three chances to pick a sock from the drawer - gives three different sock colour, for Instance: 1st chance - Black. and chance Brown zod chance- white In the chance, whatever the colour is, it should make a pair the first 4 2 need So, the resturiction is "O can't be placed in hundreds place &e "3" can't be placed in cuits place. 230 4 with one og three. i. Our :- we 3 digit even number 206 260 302 320 326 360 362 306 602 620 632. 630. be :"14" those digit even numbey can generated without replacements.