Question 46
A student on vacation for $d$ days observed that
$(1)$ it rained $7$ times, morning or afternoon;
$(2)$ when it rained in the afternoon, it was clear in the morning;
$(3)$ there were five clear afternoons;
$(4)$ there were six clear mornings.
Then $d$ equals:
$(1)$ it rained $7$ times, morning or afternoon;
$(2)$ when it rained in the afternoon, it was clear in the morning;
$(3)$ there were five clear afternoons;
$(4)$ there were six clear mornings.
Then $d$ equals: