1.In an arithmetic progression, if S40=1030S_{40} = 1030S40=1030 and S12=57S_{12} = 57S12=57, then S30−S10S_{30} - S_{10}S30−S10 is equal to:a.525525525b.510510510c.515515515d.505505505Login to continueOnly logged in users canattempt or see the solution.
