Senior teacher 96*( 1/8)=2.

Intermediate teachers 144*( 1/8)=3.

Junior teacher 48*( 1/8)= 1.

(2) 1/6 * 3/5+ 1/5 *3/6= 1/5

(3) The probability of being selected by the same expert is 2/6 *1/5 =115.

The probability of being selected by the same expert is1-115 =14/15.