Current location - Training Enrollment Network - Mathematics courses - Wait online … big brother and big sister help me calculate a math probability problem in senior three.
Wait online … big brother and big sister help me calculate a math probability problem in senior three.
1, the probability of getting compensation: method 1 equals 1 minus the probability of not getting compensation, that is, p =1-(1-19) * (1-/kloc)

Method 2, p =1/9 * 9/10 *1+8/9 *110 */.

2. Distribution table and expected value of compensation amount.

The possible values of are 0.9000,18000,36000.

p 1(= 0)= 8/9 * 9/ 10 * 10/ 1 1

p2(= 9000)= 1/9 * 9/ 10 * 10/ 10+8/9 * 10 * 10/ 10/ 1 1+8/9 * 9/ 10+00 * 65438

P3(= 18000)= 1/9 * 1/ 10 * 10/ 1+ 1/9 * 9/ 10 * 1/ 1 1+8/9 * 1/65438

P4(= 27000)= 1/9 * 1/ 10 * 1/ 1 1

Finally, according to the expected value formula E = 0 * p1+9000 * P2+18000 * P3+27000 * P4, the expected value can be substituted.