A fire station has from zero to five calls each day. It is estimated that the probability distribution for the number of calls is given below. Determine the expected number of service calls.
Number of calls012345Probability0.100.100.200.350.100.15
So i did 0x0.1+1x0.1+2x0.2+3x0.35+4x0.1+5x0.15 which gives me 2.7
what have i done wrong?