Question

Because of a mistake, a factory has mixed 30 high-resisting spikes with 25 common spikes, they all physically similar, so it's almost impossible to realize which belong to each group. If a factory worker were take out 2 spikes successivilly. What is the possibility of one is a high-resisting spike and the other a common spike? #ganeshie8

Answer 1

#ganeshie8

Answer 2

Use @ instead of # when tagging a person. :)

Answer 3

@ganeshie8

Answer 4

@ganeshie8

Answer 5

thanks mehek14

Answer 6

You're welcome. :)

Answer 7

@mehek14 could you help me to this exercise?

Answer 8

Sorry, I don't know :c

Answer 9

use combination probability if the order doesn't matter
use permutations probability if order does matter
so which one is it?

Answer 10

i am gess