Words from the letters of the word PROBABILITY are formed by taking all letters at a time. The probability that both B’s are not together and both I’s are not together is

Words from the letters of the word PROBABILITY are formed by taking all letters at a time. The probability that both B’s are not together and both I’s are not together is

Question : Words from the letters of the word PROBABILITY are formed by taking all letters at a time. The probability that both B’s are not together and both I’s are not together is