1.The value of 50C4+∑r=1656−rC350C_4 + \sum_{r=1}^{6} {}^{56-r}C_350C4+∑r=1656−rC3 isa.56C4{}^{56}C_456C4b.56C3{}^{56}C_356C3c.55C3{}^{55}C_355C3d.55C4{}^{55}C_455C4Login to continueOnly logged in users canattempt or see the solution.
